2023
Non-thermal Tomonaga-Luttinger liquid eventually emerging from hot electrons in the quantum Hall regime
Kotaro Suzuki, Tokuro Hata, Yuya Sato, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa Communications Physics 6, 103 (2023). [abstract]
2022
Impact of in situ controlled disorder screening on fractional quantum Hall effects and composite fermion transport
T. Akiho and K. Muraki Phys. Phys. B 106, 075302 (2022). [abstract]
Fast time-domain current measurement for quantum dot charge sensing using a homemade cryogenic transimpedance amplifier
Heorhii Bohuslavskyi, Masayuki Hashisaka, Takase Shimizu, Takafumi Akiho, Koji Muraki, and Norio Kumada Appl. Phys. Lett. 121, 184003 (2022). [abstract]
Time-resolved measurement of ambipolar edge magnetoplasmon transport in InAs/InGaSb composite quantum wells
H. Kamata, H. Irie, N. Kumada, and K. Muraki Phys. Phys. Research 4, 033214 (2022). [abstract]
Nonuniform heat redistribution among multiple channels in the integer quantum Hall regime
Ryota Konuma, Chaojing Lin, Tokuro Hata, Taichi Hirasawa, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa Phys. Rev. B 105, 235302 (2022). [abstract]
Gate tuning of fractional quantum Hall states in an InAs two-dimensional electron gas
S. Komatsu, H. Irie, T. Akiho, T. Nojima, T. Akazaki, and K. Muraki Phys. Phys. B 105, 075305 (2022). [abstract]
2021
Homemade-HEMT-based transimpedance amplifier for high-resolution shot-noise measurements
Takase Shimizu, Masayuki Hashisaka, Heorhii Bohuslavskyi, Takafumi Akiho, Norio Kumada, Shingo Katsumoto, and Koji Muraki Rev. Sci. Inst. 92, 124712 (2021). [abstract]
Time-resolved investigation of plasmon mode along interface channels in integer and fractional quantum Hall regimes
Chaojing Lin, Masayuki Hashisaka, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa Phys. Rev. B 104, 125304 (2021). [abstract]
Andreev reflection of fractional quantum Hall quasiparticles
M. Hashisaka, T. Jonckheere, T. Akiho, S. Sasaki, J. Rech, T. Martin, and K. Muraki Nature Comm. 12, 2794 (2021). [abstract]
Cryogenic GaAs high-electron-mobility-transistor amplifier for current noise measurements
Sanghyun Lee, Masayuki Hashisaka, Takafumi Akiho, Kensuke Kobayashi, and Koji Muraki Rev. Sci. Inst. 92, 023910 (2021). [abstract]
Screening Effects of Superlattice Doping on the Mobility of GaAs Two-Dimensional Electron System Revealed by in situ Gate Control
T. Akiho and K. Muraki Phys. Rev. Applied 15, 024003 (2021)). [abstract]
Quantized charge fractionalization at quantum Hall Y junctions in the disorder dominated regime
Chaojing Lin, Masayuki Hashisaka, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa Nature Comm. 12, 131 (2021). [abstract]
2020
On-chip coherent frequency-domain THz spectroscopy for electrical transport
Katsumasa Yoshioka, Norio Kumada, Koji Muraki, and Masayuki Hashisaka Appl. Phys. Lett. 117, 161103 (2020). [abstract]
Energy gap tuning and gate-controlled topological phase transition in InAs/In_{x}Ga_{1-x}Sb composite quantum wells
H. Irie, T. Akiho, F. Couedo, K. Suzuki, K. Onomitsu, and K. Muraki Phys. Rev. Materials 4, 104201 (2020). [abstract]
Suppression of gate screening on edge magnetoplasmons by highly resistive ZnO gate
N. Kumada, N.-H. Tu, K.-i. Sasaki, T. Ota, M. Hashisaka, S. Sasaki, K. Onomitsu, and K. Muraki Phys. Rev. B 101, 205205 (2020). [abstract]
Sensitive current measurement on a quantum antidot with a Corbino-type electrode
Tokuro Hata, Tomoki Uchino, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa Jpn. J. Appl. Phys. 59, SGGI03 (2020). [abstract]
Impact of epitaxial strain on the topological-nontopological phase diagram and semimetallic behavior of InAs/GaSb composite quantum wells
H. Irie, T. Akiho, F. Couedo, R. Ohana, K. Suzuki, K. Onomitsu, and K. Muraki Phys. Rev. B 101, 075433 (2020). [abstract]
Active spatial control of terahertz plasmons in graphene
Ngoc Han Tu, Katsumasa Yoshioka, Satoshi Sasaki, Makoto Takamura, Koji Muraki, and Norio Kumada Communications Materials 1, 7 (2020). [abstract]
Two-step breakdown of a local v = 1 quantum Hall state
Masayuki Hashisaka, Koji Muraki, and Toshimasa Fujisawa Phys. Rev. B 101, 041303(R) (2020). [abstract]
2019
Ballistic hot-electron transport in a quantum Hall edge channel defined by a double gate
Shunya Akiyama, Taichi Hirasawa, Yuya Sato, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa Appl. Phys. Lett. 115, 243106 (2019). [abstract]
Counterflowing edge current and its equilibration in quantum Hall devices with sharp edge potential: Roles of incompressible strips and contact configuration
T. Akiho, H. Irie, K. Onomitsu, and K. Muraki Phys. Phys. B 99, 121303(R) (2019). [abstract]
Determination of g-factor in InAs two-dimensional electron system by capacitance spectroscopy
H. Irie, T. Akiho, and K. Muraki Appl. Phys. Express 12, 063004 (2019). [abstract]
Charge equilibration in integer and fractional quantum Hall edge channels in a generalized Hall-bar device
Chaojing Lin, Ryota Eguchi, Masayuki Hashisaka, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa Phys. Phys. B 99, 195304 (2019). [abstract]
Spectroscopic study on hot-electron transport in a quantum Hall edge channel
Tomoaki Ota, Shunya Akiyama, Masayuki Hashisaka, Koji Muraki, and Toshimasa Fujisawa Phys. Phys. B 99, 085310 (2019). [abstract]
Surface-acoustic-wave resonators with Ti, Cr, and Au metallization on GaAs
Ryo Takasu, Yuya Sato, Tokuro Hata, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa Appl. Phys. Express 12, 055001 (2019). [abstract]
2018
Landau-Zener-Stuckelberg interference in coherent charge oscillations of a one-electron double quantum dot
Takeshi Ota, Kenichi Hitachi, and Koji Muraki Scientific Reports 8, 5491 (2018). [abstract]
Coupling between quantum Hall edge channels on opposite sides of a Hall bar
Ngoc Han Tu, Masayuki Hashisakaa, Takeshi Ota, Yoshiaki Sekine, KojiMuraki, Toshimasa Fujisawa, and NorioKumada Solid State Commun. 283, 32 (2018). [abstract]
Signatures of a Nonthermal Metastable State in Copropagating Quantum Hall Edge Channels
Kosuke Itoh, Ryo Nakazawa, Tomoaki Ota, Masayuki Hashisaka, Koji Muraki, and Toshimasa Fujisawa Phys. Phys. Lett. 120, 197701 (2018). [abstract]
Electronic energy spectroscopy of monochromatic edge magnetoplasmons in the quantum Hall regime
Tomoaki Ota, Masayuki Hashisaka, Koji Muraki, and Toshimasa Fujisawa J. Phys.: Condens. Matter 30, 345301 (2018). [abstract]
Generation and detection of edge magnetoplasmons in a quantum Hall system using a photoconductive switch
Chaojing Lin, Kyosuke Morita, Koji Muraki and Toshimasa Fujisawa Jpn. J. Appl. Phys. 57, 04FK02 (2018). [abstract]
2017
Waveform measurement of charge- and spin-densitywavepackets in a chiral Tomonaga-Luttinger liquid
M. Hashisaka, N. Hiyama, T. Akiho, K. Muraki and T. Fujisawa Nature Physics 13, 559 (2017). [abstract]
Charge fractionalization in artificial Tomonaga-Luttinger liquids with controlled interaction strength
Paul Brasseur, Ngoc Han Tu, Yoshiaki Sekine, Koji Muraki, Masayuki Hashisaka, Toshimasa Fujisawa, and Norio Kumada Phys. Rev. B 96, 081101(R) (2017). [abstract]
Dissipative Landau-Zener transition in double quantum dot under sinusoidal potential modulation
Takeshi Ota, Kenichi Hitachi, Koji Muraki and Toshimasa Fujisawa Appl. Phys. Express 10, 115201 (2017). [abstract]
Two-electron double quantum dot coupled to coherent photon and phonon fields
Yuya Sato, Jason C. H. Chen, Masayuki Hashisaka, Koji Muraki, and Toshimasa Fujisawa Phys. Rev. B 96, 115416 (2017). [abstract]
Negative and positive cross-correlations of current noises in quantum Hall edge channels at bulk filling factor �� = 1
T. Ota, M. Hashisaka, K. Muraki and T. Fujisawa J. Phys.: Condens. Matter 29, 225302 (2017). [abstract]
Detection and Control of Spin-Orbit Interactions in a GaAs Hole Quantum Point Contact
A. Srinivasan, D. S. Miserev, K. L. Hudson, O. Klochan, K. Muraki, Y. Hirayama, D. Reuter, A. D. Wieck, O. P. Sushkov, and A. R. Hamilton Phy. Rev. Lett. 118, 146801 (2017). [abstract]
2016
Engineering quantum spin Hall insulators by strained-layer heterostructures
T. Akiho, F. Couedo, H. Irie, K. Suzuki, K. Onomitsu, and K. Muraki Appl. Phys. Lett. 109, 192105 (2016). [abstract]
Single-edge transport in an InAs/GaSb quantum spin Hall insulator
Francois Couedo, Hiroshi Irie, Kyoichi Suzuki, Koji Onomitsu, and Koji Muraki Phys. Rev. B 94, 035301 (2016). [abstract]
Andreev reflection and bound state formation in a ballistic two-dimensional electron gas probed by a quantum point contact
Hiroshi Irie, Clemens Todt, Norio Kumada, Yuichi Harada, Hiroki Sugiyama, Tatsushi Akazaki, and Koji Muraki Phys. Rev. B 94, 155305 (2016). [abstract]
Long-lived binary tunneling spectrum in the quantum Hall Tomonaga-Luttinger liquid
K.Washio, R. Nakazawa, M. Hashisaka, K. Muraki, Y. Tokura, and T. Fujisawa Phys. Rev. B 93, 075304 (2016). [abstract]
Electrical control of the sign of the g factor in a GaAs hole quantum point contact
A. Srinivasan, K. L. Hudson, D. Miserev, L. A. Yeoh, O. Klochan, K. Muraki, Y. Hirayama, O. P. Sushkov, and A. R. Hamilton Phys. Rev. B 94, 041406(R) (2016). [abstract]
Evaluation of disorder introduced by electrolyte gating through transport measurements in graphene
Andrew Browning, Norio Kumada*, Yoshiaki Sekine, Hiroshi Irie, Koji Muraki, and Hideki Yamamoto Appl. Phys. Express 9, 065102 (2016). [abstract]
2015
NMR probing of spin and charge order near odd-integer filling in the second Landau level
T. D. Rhone, L. Tiemann, and K. Muraki Phys. Rev. B 92, 041301(R) (2015). [abstract]
Gate-controlled semimetal-topological insulator transition in an InAs/GaSb heterostructure
Kyoichi Suzuki, Yuichi Harada, Koji Onomitsu, and Koji Muraki Phys. Rev. B 91, 245309 (2015). [abstract]
Probing the extended-state width of disorder-broadened Landau levels in epitaxial graphene
K. Takase, H. Hibino, and K. Muraki Phys. Rev. B 92, 125407 (2015). [abstract]
Shot-noise evidence of fractional quasiparticle creation in a local fractional quantum Hall state
Masayuki Hashisaka, Tomoaki Ota, Koji Muraki, and Toshimasa Fujisawa Phys. Rev. Lett. 114, 056802 (2015). [abstract]
Exchange-Induced Spin Blockade in a Two-Electron Double Quantum Dot
D. Imanaka, S. Sharmin, M. Hashisaka, K. Muraki, and T. Fujisawa Phys. Rev. Lett. 115, 176802 (2015). [abstract]
Enhanced electron-phonon coupling for a semiconductor charge qubit in a surface phonon cavity
J. C. H. Chen, Y. Sato, R. Kosaka, M. Hashisaka, K. Muraki, and T. Fujisawa Scientific Reports 5, 15176 (2015). [abstract]
Self-aligned gate-all-around InAs/InP core-shell nanowire field-effect transistors
Satoshi Sasaki, Kouta Tateno, Guoqiang Zhang, Henry Pigot, Yuichi Harada, Shiro Saito, Akira Fujiwara, Tetsuomi Sogawa, and Koji Muraki Jpn. J. Appl. Phys. 54, 04DN04 (2015). [abstract]
2014
NMR profiling of quantum electron solids in high magnetic fields
L. Tiemann (*), T. D. Rhone (*), N. Shibata, and K. Muraki (* equal contribution) Nature Physics 10, 648-652 (2014). [abstract] (published online, Jul. 20, 2014)
Fractionalized wave packets from an artificial Tomonaga-Luttinger liquid
H. Kamata, N. Kumada, M. Hashisaka, K. Muraki, and T. Fujisawa Nature Nanotechnology 9, 177-181 (2014). [abstract] (published online, Feb. 9, 2014)
Stable and unstable dynamics of Overhauser fields in a double quantum dot
Sonia Sharmin, Koji Muraki, and Toshimasa Fujisawa Phys. Rev. B 89, 115315 (2014). [abstract]
Spin-dependent tunneling rates for electrostatically defined GaAs quantum dots
M. Yamagishi, N. Watase, M. Hashisaka, K. Muraki, and T. Fujisawa Phys. Rev. B 90, 035306 (2014). [abstract]
Plasmon transport and its guiding in graphene
N. Kumada, R. Dubourget, K. Sasaki, S. Tanabe, H. Hibino, H. Kamata, M. Hashisaka, K. Muraki, and T Fujisawa New J. of Phys. 16, 063055 (2014). [abstract]
Cross-correlation measurement of quantum shot noise using homemade transimpedance amplifiers
Masayuki Hashisaka, Tomoaki Ota, Masakazu Yamagishi, Toshimasa Fujisawa, and Koji Muraki Rev. Sci. Inst. 85, 054704 (2014). [abstract]
Single-electron counting statistics with a finite frequency bandwidth
Narii Watase, Masayuki Hashisaka, Koji Muraki, and Toshimasa Fujisawa Jpn. J. Appl. Phys. 53, 04EJ01 (2014). [abstract]
Transport Spectroscopy of Epitaxial Graphene on SiC Using Quantum Capacitances
Keiko Takase, Shinichi Tanabe, Satoshi Sasaki, Hiroki Hibino, and Koji Muraki JPS Conf. Proc. (2014). Proceedings of APPC12 [abstract]
2013
Real-space imaging of fractional quantum Hall liquids
Junichiro Hayakawa, Koji Muraki, and Go Yusa Nature Nanotechnology 8, 31-35 (2013). [abstract] (published online, Dec. 2, 2012)
v = 5/2 fractional quantum Hall state in low-mobility electron systems: Different roles of disorder
Gerardo Gamez and Koji Muraki Phys. Rev. B 88, 075308 (2013). [abstract]
Edge channel transport in the InAs/GaSb topological insulating phase
Kyoichi Suzuki, Yuichi Harada, Koji Onomitsu, and Koji Muraki Phys. Rev. B 87, 235311 (2013). [abstract]
Shot noise spectroscopy on a semiconductor quantum dot in the elastic and inelastic cotunneling regimes
Y. Okazaki, S. Sasaki, and K. Muraki Phys. Rev. B 87, 041302(R) (2013). [abstract]
Distributed-element circuit model of edge magnetoplasmon transport
Masayuki Hashisaka, Hiroshi Kamata, Norio Kumada, Kazuhisa Washio, Ryuji Murata, Koji Muraki, and Toshimasa Fujisawa Phys. Rev. B 88, 235409 (2013). [abstract]
Plasmon transport in graphene investigated by time-resolved electrical measurements
N. Kumada, S. Tanabe, H. Hibino, H. Kamata, M. Hashisaka, K. Muraki, and T. Fujisawa Nature Communications 4, 1363 (2013). [abstract]
Intrinsic and extrinsic origins of low-frequency noise in GaAs/AlGaAs Schottky-gated nanostructures
Kenichi Hitachi, Takeshi Ota, and Koji Muraki Appl. Phys. Lett. 102, 192104 (2013). [abstract]
Encapsulated gate-all-around InAs nanowire field-effect transistors
Satoshi Sasaki, Kouta Tateno, Guoqiang Zhang, Henri Suominen, Yuichi Harada, Shiro Saito, Akira Fujiwara, Tetsuomi Sogawa and Koji Muraki Appl. Phys. Lett. 103, 213502 (2013). [abstract]
Transient current in the spin blockade region of a double quantum dot
Sonia Sharmin, Koji Muraki, and Toshimasa Fujisawa Jpn. J. of Appl. Phys. 52, 110204 (2013). [abstract]
2012
Unraveling the Spin Polarization of the v = 5/2 Fractional Quantum Hall State
L. Tiemann, G. Gamez, N. Kumada, and K. Muraki Science 335, 828-831 (2012). [abstract] (published online January 26 2012, Science Express)
Magnetic-Field Dependence of Tunnel Couplings in Carbon Nanotube Quantum Dots
K. Grove-Rasmussen, S. Grap, J. Paaske, K. Flensberg, S. Andergassen, V. Meden, H. I. Jorgensen, K. Muraki, and T. Fujisawa Phys. Rev. Lett. 108, 176802 (2012). [abstract]
Impact of graphene quantum capacitance on transport spectroscopy
K. Takase, S. Tanabe, S. Sasaki, H. Hibino, and K. Muraki Phys. Rev. B 86, 165435 (2012). [abstract]
Distributed electrochemical capacitance evidenced in high-frequency admittance measurements on a quantum Hall device
Masayuki Hashisaka, Kazuhisa Washio, Hiroshi Kamata, Koji Muraki, and Toshimasa Fujisawa Phys. Rev. B 85, 155424 (2012). [abstract]
Frequency conversion of radio-frequency edge magnetoplasmons using a quantum point contact
M. Hashisaka, R. Murata, K. Muraki, and T. Fujisawa Appl. Phys. Lett. 100, 233501 (2012). [abstract]
Correlation of 1/f Noise between Semiconductor Point Contacts with a Common Lead
Masakazu Yamagishi, Masayuki Hashisaka, Koji Muraki, and Toshimasa Fujisawa Jpn. J. Appl. Phys. 51, 02BJ08 (2012). [abstract]
2011
Observation of hysteretic transport due to dynamic nuclear spin polarization in a GaAs lateral double quantum dot
T. Kobayashi, K. Hitachi, S. Sasaki, and K. Muraki Phys. Rev. Lett. 107, 216802 (2011). [abstract]
Spin-orbital Kondo effect in a parallel double quantum dot
Y. Okazaki, S. Sasaki, and K. Muraki Phys. Rev. B 84, 161305(R) (2011). [abstract]
Impact of Valley Polarization on the Resistivity in Two Dimensions
K. Takashina, Y. Niida, V. T. Renard, A. Fujiwara, T. Fujisawa, K. Muraki, and Y. Hirayama Phys. Rev. Lett. 106, 196403 (2011). [abstract]
Gate-Dependent Orbital Magnetic Moments in Carbon Nanotubes
T. S. Jespersen, K. Grove-Rasmussen, K. Flensberg, J. Paaske, K. Muraki, T. Fujisawa, and J. Nygard Phys. Rev. Lett. 107, 186802 (2011). [abstract]
Gate-dependent spin-orbit coupling in multielectron carbon nanotubes
T. S. Jespersen, K. Grove-Rasmussen, J. Paaske, K. Muraki, T. Fujisawa, J. Nygard, and K. Flensberg Nature Physics 7, 348-353 (2011). [abstract]
Gate Operation of InAs/AlGaSb Heterostructures with an Atomic-layer-deposited Insulating Layer
K. Suzuki, Y. Harada, F. Maeda, K. Onomitsu, T. Yamaguchi, and K. Muraki Appl. Phys. Express�@4, 125702 (2011). [abstract]
Density-Imbalance Stability Diagram of the vT = 1 Bilayer Electron System at Full Spin Polarization
Keiko Takase and Koji Muraki J. Phys.: Conf. Ser. 334, 012025 (2011). [abstract]
Field and Density Dependence of Edge Magnetoplasmon Transport in a Quantum Hall System
N Kumada, H Kamata, K Muraki and T Fujisawa J. Phys.: Conf. Ser. 334, 012032 (2011). [abstract]
Admittance Measurement for a Quantum Point Contact in Multiterminal Quantum Hall Device
K. Washio, M. Hashisaka, H. Kamata, K. Muraki, and T. Fujisawa Jpn. J. Appl. Phys. 50, 04DJ04 (2011). [abstract]
Time Resolved Potential Measurement At Quantum Point Contacts Under Irradiation Of Surface Acoustic Burst Wave
T. Fujisawa, K. Nishio, T. Nagase, M. Hashisaka, and K. Muraki AIP Conf. Proc. 1399, 269 (2011).
2010
Intrinsic Gap and Exciton Condensation in the vT=1 Bilayer System
P. Giudici, K. Muraki, N. Kumada, and T. Fujisawa Phys. Rev. Lett. 104, 056802 (2010). [abstract]
Wide-Band Capacitance Measurement on a Semiconductor Double Quantum Dot for Studying Tunneling Dynamics
T. Ota, T. Hayashi, K. Muraki, and T. Fujisawa Appl. Phys. Lett. 96, 032104 (2010). [abstract]
Voltage-controlled group velocity of edge magnetoplasmon in the quantum Hall regime
H. Kamata, T. Ota, K. Muraki, and T. Fujisawa Phys. Rev. B 81, 085329 (2010). [abstract]
Separately contacted monocrystalline silicon double-layer structure with an amorphous silicon dioxide barrier made by wafer bonding
K. Takashina, M. Nagase, K. Nishiguchi, Y. Ono, H. Omi, A. Fujiwara, T. Fujisawa, and K. Muraki Semicond. Sci. Technol. 25, 125001 (2010) [abstract]
Fabrication and characterization of an induced GaAs single hole transistor
O. Klochan, J. C. H. Chen, A. P. Micolich, A. R. Hamilton, K. Muraki, and Y. Hirayama Appl. Phys. Lett. 96, 092103 (2010). [abstract]
Crystallographic anisotropy of the Zeeman splitting in 1D hole quantum wires
O. Klochan, A. P. Micolich, L. H. Ho, A. R. Hamilton, K. Muraki, and Y. Hirayama Physica E 42, 967 (2010). [abstract]
2009
Spin effects in the phase transition of the vT = 1 bilayer electron system
K. Muraki, P. Giudici, and N. Kumada Int. J. Mod. Phys. B 23, 2587 (2009). [abstract]
The interplay between one-dimensional confinement and two-dimensional crystallographic anisotropy effects in ballistic hole quantum wires
O. Klochan, A. P. Micolich, L. H. Ho, A. R. Hamilton, K. Muraki, and Y. Hirayama New J. Phys. 11, 043018 (2009). [abstract]
Electrons and Holes in a 40 nm Thick Silicon Slab at Cryogenic Temperatures
K. Takashina, K. Nishiguchi, Y. Ono, A. Fujiwara, T. Fujisawa, Y. Hirayama, and K. Muraki Appl. Phys. Lett. 94, 142104 (2009). [abstract]
Room-Temperature Stability of Pt Nanogaps Formed by Self-Breaking
F. Prins, T. Hayashi, B. J. A. de Vos van Steenwijk, B. Gao, E. A. Osorio, K. Muraki, and H. S. J. van der Zant Appl. Phys. Lett. 94, 123108 (2009). [abstract]
Electron-Spin/Nuclear-Spin Interactions and NMR in Semiconductors
Y. Hirayama, G. Yusa, K. Hashimoto, N. Kumada, T. Ota, and K. Muraki Semicond. Sci. Technol .24, 023001 (2009). [abstract]
Bidirectional Current Drag Induced by Two-Electron Cotunneling in Coupled Double Quantum Dots
G. Shinkai, T. Hayashi, T. Ota, K. Muraki, and T. Fujisawa Appl. Phys. Exp. 2, 081101 (2009). [abstract]
2008
Spin-Dependent Phase Diagram of the vT=1 Bilayer Electron System
P. Giudici, K. Muraki, N. Kumada, Y. Hirayama, and T. Fujisawa Phys. Rev. Lett. 100, 106803 (2008). [abstract]
Highly Reproducible Fabrication of Back-Gated GaAs/AlGaAs Heterostructures using AuGeNi Ohmic Contacts with Initial Ni Layer
A. Valeille, K. Muraki, and Y. Hirayama Appl. Phys. Lett. 92, 152106 (2008). [abstract]
Modulation of Bilayer Quantum Hall States by Tilted-Field-Induced Subband-Landau-Level Coupling
N. Kumada, K. Iwata, K. Tagashira, Y. Shimoda, K. Muraki, Y. Hirayama, and A. Sawada Phys. Rev. 77, 155324 (2008). [abstract]
Exciton Condensate at a Total Filling Factor of One in Corbino Two-Dimensional Electron Bilayers
L. Tiemann, J. G. S. Lok, W. Dietsche, K. von Klitzing, K. Muraki, D. Schuh, and W. Wegscheider Phys. Rev. B 77, 033306 (2008). [abstract]
Impact of Long- and short-range disorder on the metallic behaviour of two-dimensional system
W. R. Clarke, C. E. Yasin, A. R. Hamilton, A. P. Micolich, M. Y. Simmons, K. Muraki, Y. Hirayama, M. Pepper, and D. A. Ritchie Nature Physics 4, 55 (2008). [abstract]
The 0.7 Anomaly in One-Dimensional Hole Quantum Wires
A. R. Hamilton, R. Danneau, O. Klochan, W. R. Clarke, A. P. Micolich, L. H. Ho, M. Y. Simmons, D. A. Ritchie, M. Pepper, K. Muraki, and Y. Hirayama J. Phys.: Condens. Matter. 20, 164205 (2008). [abstract]
NMR Study of a Canted Antiferromagnet in a Bilayer Quantum Hall System
N. Kumada, K. Muraki , and Y. Hirayama Physica E 40, 937 (2008). [abstract]
Investigating the Transport Properties of the Excitonic State in Quasi-Corbino Electron Bilayers
L. Tiemann, J. G. S. Lok, W. Dietsche, K. von Klitzing, K. Muraki, D. Schuh, and W. Wegscheider Physica E 40, 1034 (2008). [abstract]
Metallic Behavior in Low-Disorder Two-Dimensional Hole Systems in the Presence of Long- and Short-Range Disorder
W. R. Clarke, C. E. Yasin, A. R. Hamilton, A. P. Micolich, M. Y. Simmons, K. Muraki, Y. Hirayama, M. Pepper, and D. A. Ritchie Physica E 40, 1599 (2008). [abstract]
Quantum Transport in One-Dimensional GaAs Hole Systems
A. R. Hamilton, O. Klochan, R. Danneau, W. R. Clarke, L. H. Ho, A. P. Micolich, M. Y. Simmons, M. Pepper, D. A. Ritchie, K. Muraki, and Y. Hirayama Int. J. Nanotechnology 5, 318 (2008). [abstract]
Nuclear Spin Manipulation in Semiconductor Nanostructures
K. Muraki, G. Yusa, and Y. Hirayama SPIE Proceedings Vol. 6800, Device and Process Technologies for Microelectronics, MEMS, Photonics, and Nanotechnology IV [abstract]
2007
NMR Evidence for Spin Canting in a Bilayer v = 2 Quantum Hall System
N. Kumada, K. Muraki , and Y. Hirayama Phys. Rev. Lett. 99, 076805 (2007). [abstract]
Interaction of Electron and Nuclear Spins in Quantum Wells
K. Muraki, N. Kumada, and Y. Hirayama Int. J. Mod. Phys. B 21, 1266 (2007). [abstract]
2006
Low-frequency spin dynamics in a canted antiferromagnet
N. Kumada, K. Muraki, and Y. Hirayama Science 313, 329 (2006). [abstract]
Electronic transport characteristics in a one-dimensional constriction defined by a triple-gate structure
H.-M. Lee, K. Muraki, E.-Y. Chang, and Y. Hirayama J. Appl. Phys. 100, 043701 (2006). [abstract]
Ballistic transport in induced one-dimensional hole systems
O. Klochan, W. R. Clarke, R. Danneau, A. P. Micolich, L. H. Ho, A. R. Hamilton, K. Muraki, and Y. Hirayama Appl. Phys. Lett. 89, 092105 (2006). [abstract]
Fabrication of induced two-dimensional hole systems on (311)A GaAs
W. R. Clarke, A. P. Micolich, A. R. Hamilton, M. Y. Simmons, K. Muraki, and Y. Hirayama J. Appl. Phys. 99, 0237071 (2006). [abstract]
Nuclear-spin-lattice relaxation in a v = 1 bilayer quantum Hall system
N. Kumada, K. Muraki, and Y. Hirayama Physica E 34, 164 (2006). [abstract]
Nanometre-scale nuclear-spin device for quantum information processing
Y. Hirayama, A. Miranowicz, T. Ota, G. Yusa, K. Muraki, S. K. Ozdemir, N. Imoto J. Phys. Condens. Mat 18, S885 (2006). [abstract]
2005
Controlled multiple quantum coherences of nuclear spins in a nonometre-scale device
G. Yusa, K. Muraki, K. Takashina, K. Hashimoto, and Y. Hirayama Nature 434, 1001 (2005). [abstract]
Spin degree of freedom in the v = 1 bilayer electron system investigated by nuclear spin relaxation
N. Kumada, K. Muraki, K. Hashimoto, and Y. Hirayama Phys. Rev. Lett 94, 096802 (2005). [abstract]
Effects of inversion asymmetry on electron-nuclear spin coupling in semiconductor heterostructures: Possible role of spin-orbit interactions
K. Hashimoto, K. Muraki, N. Kumada, T. Saku, and Y. Hirayama Phys. Rev. Lett 94, 146601 (2005). [abstract]
Resistance oscillations by electron-nuclear spin coupling in microscopic quantum Hall devices
G. Yusa, K. Hashimoto, K. Muraki,T. Saku, and Y. Hirayama Jpn. J. Appl. Phys. 44, 2669 (2005). [abstract]
Fabrication and characterization of a 2D hole system in a novel (311)A GaAs SISFET
W. R. Clarke, A. P. Micolich, A. R. Hamilton, M. Y. Simmons, K. Muraki, and Y. Hirayama Mocroelectron. Journal 36, 327 (2005). [abstract]
2004
Coulomb drag as a probe of the nature of compressible states in a magnetic field
K. Muraki, J. G. S. Lok, S. Kraus, W. Dietsche, K. von Klitzing, D. Schuh, M. Bichler, and W. Wegscheider Phys. Rev. Lett. 92, 246801 (2004). [abstract]
Phase diagrams of v = 2 and v = 2/3 quantum Hall states in bilayer systems
N. Kumada, D. Terasawa, M. Morino, K. Tagashira, A. Sawada, Z. F. Ezawa, K. Muraki, Y. Hirayama, and T. Saku Phys. Rev. B 69, 155319 (2004). [abstract]
Self-sustaining resistance oscillations: Electron-nuclear spin coupling in mesoscopic quantum Hall devices
G. Yusa, K. Hashimoto, K. Muraki, T. Saku, and Y. Hirayama Phys. Rev. B 69, 161302(R) (2004). [abstract]
Intralayer backscattering in narrow GaAs/AlGaAs/GaAs bilayer channels
G. Yusa, K. Muraki, T. Saku, and Y. Hirayama Phys. Rev. B 69, 085323 (2004). [abstract]
Integer filling factor phases and isospin in vertical diatomic artificial molecules
D. G. Austing, S. Tarucha, H. Tamura, K. Muraki, F. Ancilotto, M. Barranco, A. Emperador, R. Mayol, and M. Pi Phys. Rev. B 70, 045324 (2004). [abstract]
Molecular phases in coupled quantum dots
M. Rontani, S. Amaha, K. Muraki, F. Manghi, E. Molinari, S. Tarucha, and D. G. Austing Phys. Rev. B 69, 085327 (2004). [abstract]
Effects of in-plane magnetic fields on spin transitions in bilayer quantum Hall states
N. Kumada, K. Tagashira, K. Iwata, A. Sawada, Z. F. Ezawa, K. Muraki, T. Saku, and Y. Hirayama Physica E 22, 36 (2004). [abstract]
Simultaneous excitation of spins and pseudospins in the bilayer �� = 1 quantum Hall state
D. Terasawa, M. Morino, K. Nakada, S. Kozumi, A. Sawada, Z. F. Ezawa, N. Kumada, K. Muraki, T. Saku, and Y. Hirayama Physica E 22, 52 (2004).[abstract]
2003
Charge excitation and transport in pseudospin quantum Hall ferromagnets
K. Muraki, T. Saku, and Y. Hirayama Physica E 18, 107 (2003). [abstract]
Pulsed-mode operation of nuclear spin polarization in integer quantum Hall systems
T. Machida, T. Yamazaki, K. Ikushima, S. Komiyama, K. Muraki, and Y. Hirayama Physica E 18, 128 (2003). [abstract]
Quantum Hall effects at Landau level crossings
Y. Hirayama, K. Muraki, K. Hashimoto, K. Takashina, and T. Saku Physica E 20, 133 (2003). [abstract]
Density functional theory application to double quantum dots: Influence of mismatch on the addition energy spectra of vertical diatomic artificial molecules
D. G. Austing, S. Sasaki, K. Muraki, K. Ono, S. Tarucha, M. Barranco, A. Emperador, M. Pi, and F. Garcias Int. J. Quant. Chem. 91, 498 (2003). [abstract]
Vertical diatomic artificial molecule in the intermediate-coupling regime in a parallel and perpendicular magnetic field
F. Ancilotto, D. G. Austing, M. Barranco, R. Mayol, K. Muraki, M. Pi, S. Sasaki, and S. Tarucha Phys. Rev. B 67, 205311 (2003). [abstract]
2002
Electrically Controlled Nuclear Spin Polarization and Relaxation by Quantum Hall States
K. Hashimoto, K. Muraki, T. Saku, and Y. Hirayama Phys. Rev. Lett. 88, 176601 (2002). [abstract]
Phase Diagram of Interacting Composite Fermions in the Bilayer v = 2/3 Quantum Hall Effect
N. Kumada, D. Terasawa, Y. Shimoda, H. Azuhata, A. Sawada, Z. F. Ezawa, K. Muraki, T. Saku, and Y. Hirayama Phys. Rev. Lett. 89, 116802 (2002). [abstract]
Activation Studies of Pseudospin Quantum Hall Ferromagnets in Double Quantum Wells
K. Muraki, T. Saku, and Y. Hirayama Physica E 12, 8 (2002) [abstract]
Spin Polarization of Fractional Quantum Hall Edge Channels Studied by Dynamic Nuclear Polarization
T. Machida, S. Ishizuka, T. Yamazaki, S. Komiyama, K. Muraki, and Y. Hirayama Phys. Rev. B 65, 233304 (2002). [abstract]
Various Phase Transitions in nu = 2/3 Bilayer Quantum Hall States
N. Kumada, D. Terasawa, Y. Shimoda, H. Azuhata, A. Sawada, Z. F. Ezawa, K. Muraki, T. Saku and Y. Hirayama Physica E 12, 32 (2002). [abstract]
Spin Polarization in Fractional Quantum Hall Edge Channels
T. Machida, S. Ishizuka and K. Muraki Physica E 12, 76 (2002). [abstract]
Dynamic nuclear-spin polarization induced by scattering between fractional quantum Hall edge channels
T. Machida, T. Yamazaki, S. Komiyama, K. Muraki, and Y. Hirayama Microelectronic Eng. 63, 63 (2002). [abstract]
Influence of Mismatch on the Addition Energy Spectra of Vertical Diatomic Artificial Molecules
D. G. Austing, S. Sasaki, K. Muraki, K. Ono, S. Tarucha, M. Barranco, A. Emperador, M. Pi and F. Garcias Physica E 12, 896 (2002). [abstract]
2001
Charge Excitations in Easy-Axis and Easy-Plane Quantum Hall Ferromagnets
K. Muraki, T. Saku, and Y. Hirayama Phys. Rev. Lett. 87, 196801 (2001). [abstract]
Dissociation of Vertical Semiconductor Diatomic Artificial Molecules
M. Pi, A. Emperador, M. Barranco, F. Garcias, K. Muraki, S. Tarucha, and D. G. Austing Phys. Rev. Lett. 87, 066801 (2001). [abstract]
Resistance Fluctuations in Quantum Hall Transitions: Network of Compressible-Incompressible Regions
T. Machida, S. Ishizuka, S. Komiyama, K. Muraki, and Y. Hirayama Phys. Rev. B 63, 045318 (2001). [abstract]
Magnetic Field Induced Transitions in the Few-Electron Ground States of Artificial Molecules
S. Amaha, D.G. Austing, Y. Tokura, K. Muraki, K. Ono, and S. Tarucha Solid State Commun. 119, 183 (2001). [abstract]
Longitudinal Resistance Anomaly Around the 2/3 Filling Factor Observed in a GaAs/AlGaAs Single Heterostructure
K. Hashimoto, K. Muraki, T. Saku, and Y. Hirayama Physica B 298, 191 (2001). [abstract]
Preferred Number of Flipped Spins in Skyrmion Excitation
N. Kumada, A. Sawada, Z.F. Ezawa, H. Azuhata, S. Nagahama, K. Muraki, T. Saku, and Y. Hirayama Physica B 298, 191 (2001). [abstract]
Nonequilibrium Population in Fractional Edge States
T. Machida, S. Ishizuka, S. Komiyama, K. Muraki, and Y. Hirayama Physica B 298, 150 (2001). [abstract]
Scaling in Fractional Quantum Hall Transitions
T. Machida, S. Ishizuka, S. Komiyama, K. Muraki, and Y. Hirayama Physica B 298, 182 (2001). [abstract]
Single Dot and Strongly Coupled Double Dots at High Magnetic Fields
D. G. Austing, H. Tamura, Y. Tokura, K. Muraki, S. Amaha, K. Ono and S. Tarucha Physica E 10, 112 (2001). [abstract]
Backgated Layers and Nanostructures
Y. Hirayama, K. Muraki, A. Kawaharazuka, K. Hashimoto, and T. Saku Physica E 11, 155 (2001). [abstract]
2000
n(+)-GaAs Back-Gated Double-Quantum-Well Structure with Full Density Control
K. Muraki, N. Kumada, T. Saku, and Y. Hirayama Jpn. J. Appl. Phys. 39, 2444 (2000). [abstract]
Doubly Enhanced Skyrmions in v = 2 Bilayer Quantum Hall States
N. Kumada, A. Sawada, Z.F. Ezawa, S. Nagahama, H. Azuhata, K. Muraki, T. Saku and Y. Hirayama J. Phys. Soc. Jpn. 69, 3178 (2000). [abstract]
Resistance Fluctuations in Integer Quantum-Hall Transitions
T. Machida, S. Ishizuka, K. Muraki, Y. Hirayama, and S. Komiyama Physica E 6, 152 (2000). [abstract]
Quantum Coherence and Skyrmion Textures in Bilayer Quantum Hall Systems
Z.F. Ezawa, A. Sawada, K. Muraki, and Y. Hirayama Physica E 6, 640 (2000). [abstract]
1999
Interlayer Charge Transfer in Bilayer Quantum Hall States at Various Filling Factors
K. Muraki, T. Saku, Y. Hirayama, N. Kumada, A. Sawada, and Z.F. Ezawa Solid State Commun. 112, 625 (1999). [abstract]
Spin Transition of a Two-Dimensional Hole System in the Fractional Quantum Hall Effect
K. Muraki and Y. Hirayama Phys. Rev. B 59, R2502 (1999). [abstract]
High-Quality Two-Dimensional Electron Gas at an Inverted Undoped Heterointerface
Y. Hirayama, K. Muraki, and T. Saku Superlattice Microst. 25, 295 (1999). [abstract]
1998
Re-entrant Behavior of the nu=4/3 Fractional Quantum Hall Effect in a Front-and-Back-Gated 2D Hole Gas
K. Muraki and Y. Hirayama Physica B 258, 86 (1998). [abstract]
Effect of Valence Band Structure on the Fractional Quantum Hall Effect of Two-Dimensional Hole Systems
K. Muraki and Y. Hirayama Physica B 251, 65 (1998). [abstract]
Photoluminescence from a Modulation-Doped AlGaAs/GaAs Heterointerface Under Cyclotron Resonance
K. Suzuki, K. Saito, K. Muraki, and Y. Hirayama Phys. Rev. B 58, 15385 (1998). [abstract]
High-Mobility Two-Dimensional Electron Gas in an Undoped Heterostructure: Mobility Enhancement After Illumination
T. Saku, K. Muraki, and Y. Hirayama Jpn. J. Appl. Phys. 37, L765 (1998). [abstract]
Two-Dimensional Electron Gas Formed in a Back-Gated Undoped Heterostructure
Y. Hirayama, K. Muraki, and T. Saku Appl. Phys. Lett. 72, 1745 (1998). [abstract]
Quantum Dot Molecules
D. G. Austing, T. Honda, K. Muraki, Y. Tokura, and S. Tarucha Physica B 251, 206 (1998). [abstract]
Electronic States in Quantum Dot Atoms and Molecules
S. Tarucha, T. Honda, D.G. Austing, Y. Tokura, K. Muraki, T.H. Oosterkamp, J.W. Janssen, L.P. Kouwenhoven Physica E 3, 112 (1998). [abstract]
Metastability of the quantum Hall states in asymmetric two-layer systems
Y. Takagaki, K.-J. Friedland, K. H. Ploog, and K. Muraki J. Phys.: Condens. Matt. 10, 8305 (1998). [abstract]
Quantum Hall Effect in Asymmetric Double Quantum Well Systems
Y. Takagaki, K. Muraki, and S. Tarucha Semocond. Sci. Technol. 13, 296 (1998). [abstract]
1997
Suppression of AlGaAs/GaAs Superlattice Intermixing by p-type Doping
K. Muraki and Y. Horikoshi J. Cryst. Growth 175, 162 (1997). [abstract]
Splitting of Resistance Peaks and Anomalous Hall Plateaus in Asymmetric Double-Quantum-Well Structures
Y. Takagaki, K. Muraki, and S. Tarucha Phys. Rev. B 56, 1057 (1997). [abstract]
The Infrared Vibrational Absorption Spectrum of the Si-X Defect Present in Heavily Si Doped GaAs
M. J. Ashwin, R. C. Newman, and K. Muraki J. Appl. Phys. 82, 137 (1997). [abstract]
1996
Evidence for Resonant Electron Capture and Charge Buildup in GaAs/AlGaAs Quantum Wells
K. Muraki, A. Fujiwara, S. Fukatsu, Y. Shiraki, and Y. Takahashi Phys. Rev. B 53, 15477 (1996). [abstract]
Fermi-Level Effect on Ga Self-Diffusion Studied Using (69)GaAs/(69)Ga(71)GaAs Isotope Superlattice
K. Muraki and Y. Horikoshi Inst. Phys. Conf. Ser. 145, 547 (1996).
1995
Observation of Spatially Indirect Transitions and Accurate Determination of Band Offset Ratio by Excitation Spectroscopy on GaAs/AlGaAs Quantum Wells Lightly Doped with Be Acceptors
K. Muraki, S. Fukatsu, Y. Shiraki, and Y. Takahashi J. Cryst. Growth 150, 49 (1995). [abstract]
Enhancement of Nonradiative Recombination Due to Resonant Electron Capture in AlGaAs/GaAs Quantum Well Structures
A. Fujiwara, K. Muraki, S. Fukatsu, Y. Shiraki, and R. Ito Phys. Rev. B 51, 14324 (1995). [abstract]
Growth of InGaAs/GaAs Strained Quantum Wells on GaAs (111)B Substrates and Continuous Wave Operation of (111)B-Oriented InGaAs Strained Quantum Well Lasers
T. Takeuchi, K. Muraki, Y. Hanamaki, S. Fukatsu, N. Yamada, N. Ogasawara, N. Mikoshiba, and Y. Shiraki J. Cryst. Growth 150, 1338 (1995). [abstract]
1994
Enhancement of Free-to-Bound Transitions Due to Resonant Electron Capture in Be-Doped AlGaAs/GaAs Quantum Well
K. Muraki, Y. Takahashi, A. Fujiwara, S. Fukatsu, and Y. Shiraki Solid State Electron 37, 1247 (1994). [abstract]
Valence-Subband Level Crossing in GaAs/GaAsP Strained-Barrier Quantum Well Structures Observed by Circularly-Polarized Photoluminescence Excitation Spectroscopy
H. Yaguchi, K. Ota, Y. Takahashi, K. Muraki, K. Onabe, Y. Shiraki, and R. Ito Solid State Electron 37, 915 (1994). [abstract]
Direct Observation of Exciton Localization in a GaAs/AlGaAs Quantum Well
Y. Takahashi, S.S. Kano, K. Muraki, S. Fukatsu, Y. Shiraki, and R. Ito Appl. Phys. Lett. 64, 1845 (1994). [abstract]
Time-of-Flight Measurement of Carrier Transport and Carrier Collection in Strained SiGe/Si Quantum Wells
S. Fukatsu, A. Fujiwara, K. Muraki, Y. Takahashi, and Y. Shiraki J. Vac. Sci. Technol. B 12, 1156 (1994). [abstract]
1993
Surface Segregation of In Atoms and Its Influence on the Quantized Levels in InGaAs/GaAs Quantum Wells
K. Muraki, S. Fukatsu, Y. Shiraki, and R. Ito J. Cryst. Growth 127, 546 (1993). [abstract]
Fast Lateral Transport of Excitons in a GaAs/AlGaAs Quantum Wells
Y. Takahashi, K. Muraki, S. Fukatsu, S.S. Kano, Y. Shiraki, and R. Ito Jpn. J. Appl. Phys. 32, 5586 (1993). [abstract]
In-Plane Transport of Excitons in Quantum Well Structures
Y. Takahashi, K. Muraki, S. Fukatsu, S.S. Kano, Y. Shiraki, and R. Ito Solid State Commun. 88, 677 (1993). [abstract]
Observation of the Valence-Subband Level Crossing in GaAs/GaAsP Strained-Barrier Quantum Well Structures Using Circularly-Polarized Photoluminescence Excitation Spectroscopy
K. Ota, H. Yaguchi, K. Onabe, R. Ito, Y. Takahashi, K. Muraki, and Y. Shiraki Appl. Phys. Lett. 63, 946 (1993). [abstract]
1992
Surface Segregation of In Atoms During Molecular Beam Epitaxy and Its Influence on the Energy Levels in InGaAs/GaAs Quantum Wells
K. Muraki, S. Fukatsu, Y. Shiraki, and R. Ito Appl. Phys. Lett. 61, 557 (1992). [abstract]
Anomalies in Photoluminescence Linewidth of InGaAs/GaAs Strained-Layer Quantum Wells
K. Muraki, S. Fukatsu, Y. Shiraki, and R. Ito Surf. Sci. 267, 107 (1992). [abstract]
Two-Dimensional Exciton Dynamics in InGaAs/GaAs Quantum Wells
Y. Takahashi, Y. Owa, S.S. Kano, K. Muraki, S. Fukatsu, Y. Shiraki, and R. Ito Appl. Phys. Lett. 60, 213 (1992). [abstract]