Recent publications
- Andreev Reflection in the Quantum Hall Regime at an Al/InAs Junction on a Cleaved Edge
Takafumi Akiho, Hiroshi Irie, Yusuke Nakazawa, Satoshi Sasaki, Norio Kumada, and Koji Muraki
Nano Lett. 24, 14790 (2024).
- Time-resolved counterpropagating edge transport in the topological insulating phase
H. Kamata, H. Irie, S. Sasaki, N. Kumada, and K. Muraki
Phys. Rev. Research 6, 043073 (2024).
- Effects of GaAs buffer layer on quantum anomalous Hall insulator Vy(BixSb1-x)2-yTe3
Y. Nakazawa, T. Akiho, K. Kanisawa, H. Irie, N. Kumada, and K. Muraki
Appl. Phys. Lett. 125, 083101 (2024).
- On-chip transfer of ultrashort graphene plasmon wavepackets using terahertz electronics
K. Yoshioka, G. Bernard, T. Wakamura, M. Hashisaka, K. Sasaki, S. Sasaki, K. Watanabe, T. Taniguchi, and N. Kumada
Nature Electronics 7, 537 (2024).
- Gate-tunable giant superconducting nonreciprocal transport in few-layer Td-MoTe2
T. Wakamura, M. Hashisaka, S. Hoshino, M. Bard, S. Okazaki, T. Sasagawa, T. Taniguchi, K. Watanabe, K. Muraki, and N. Kumada
Phys. Rev. Research 6, 013132 (2024).
- Emission and coherent control of Levitons in graphene
A. Assouline, L. Pugliese, H. Chakraborti, S. Lee, L. Bernabeu, M. Jo, K. Watanabe, T. Taniguchi, D. C. Glattli, N. Kumada, H.-S. Sim, F. D. Parmentier, and P. Roulleau
Science 382, 1260 (2023).
- Coherent-Incoherent Crossover of Charge and Neutral Mode Transport as Evidence for the Disorder-Dominated Fractional Edge Phase
M. Hashisaka, T. Ito, T. Akiho, S. Sasaki, N. Kumada, N. Shibata, and K. Muraki
Phys. Rev. X 13, 031024 (2023).
- Fast time-domain current measurement for quantum dot charge sensing using a homemade cryogenic transimpedance amplifier
H. Bohuslavskyi, M. Hashisaka, T. Shimizu, T. Akiho, K. Muraki, and N. Kumada
Appl. Phys. Lett. 121, 184003 (2022).
- Time-resolved measurement of ambipolar edge magnetoplasmon transport in InAs/InGaSb composite quantum wells
H. Kamata, H. Irie, N. Kumada, and K. Muraki
Phys. Rev. Research 4, 033214 (2022).
- Scaling behavior of electron decoherence in a graphene Mach-Zehnder interferometer
M. Jo, J. M. Lee, A. Assouline, P. Brasseur, K. Watanabe, T. Taniguchi, P. Roche, D. C. Glattli, N. Kumada, F. D. Parmentier, H. -S. Sim, and P. Roulleau
Nature Commun. 13, 5473 (2022).
- Ultrafast intrinsic optical-to-electrical conversion dynamics in graphene photodetector
Katsumasa Yoshioka, Taro Wakamura, Masayuki Hashisaka, Kenji Watanabe, Takashi Taniguchi, and Norio Kumada
Nature Photonics 16, 718 (2022).
Presentations in international conferences in the last one year and those upcoming
- Propagation Control of Ultrashort Plasmon Wavepacket in Graphene (Invited)
K. Yoshioka, G. Bernard, T. Wakamura, M. Hashisaka, K. Sasaki, S. Sasaki, K. Watanabe, T. Taniguchi, and N. Kumada
ICPS 2024
- Evaluation of the spin-orbit interaction in atomically thin Td-MoTe2
Taro Wakamura, Masayuki Hashisaka, Matthieu Bard, Shota Okazaki, Takao Sasagawa, Takashi Taniguchi, Kenji Watanabe, Koji Muraki, and Norio Kumada
ICPS 2024
- Coupling of Quantum Hall Effect and Superconductivity Using Al/InAs Junction on Cleaved Edge Surface
Takafumi Akiho, Hiroshi Irie, Yusuke Nakazawa, Satoshi Sasaki, Norio Kumada, and Koji Muraki
ICPS 2024
- Coercive field enhancement in the quantum anomalous Hall insulators Vy(BixSb1-x)2-yTe3 and Cry(BixSb1-x)2-yTe3 grown on a GaAs buffer layer
Yusuke Nakazawa, Takafumi Akiho, Kiyoshi Kanisawa, Hiroshi Irie, Norio Kumada, and Koji Muraki
ICPS 2024
- Fractionalization of an Electronic Superposition State in Interacting Quantum Hall Edge Channels
Takase Shimizu, Eiki Iyoda, Satoshi Sasaki, Akira Endo, Shingo Katsumoto, Norio Kumada, and Masayuki Hashisaka
ICPS 2024
- Ultrafast Carrier Dynamics in Graphene Investigated by Terahertz Spectroscopy (Invited)
Norio Kumada
Comaruga 2024
- Ultrafast Carrier Dynamics in Graphene Investigated by Terahertz Spectroscopy (Invited)
Norio Kumada
Germany-Japan Workshop on Recent Developments in Quantum Materials and Nanoscale Devices
- Ultrafast carrier dynamics in graphene (Invited)
Norio Kumada
Moriond Meso
- Coherent-Incoherent Crossover of Charge and Neutral Mode Transport as Evidence for the Disorder-Dominated Fractional Edge Phase (Invited)
Masayuki Hashisaka, Takuya Ito, Takafumi Akiho, Satoshi Sasaki, Norio Kumada, Naokazu Shibata, Koji Muraki
Quantum Phenomena in 2D Matter
- Ultrafast Dynamics of Optical-to-Electrical Conversion in Black Phosphorus
Katsumasa Yoshioka, Taro Wakamura, and Norio Kumada
EP2DS-25/MSS-21
- Ultrafast On-chip Readout of Propagating THz Graphene Plasmon Wavepackets
K. Yoshioka, G. Bernard, T. Wakamura, M. Hashisaka, K. Watanabe, T. Taniguchi, and N. Kumada
EP2DS-25/MSS-21
- Novel superconducting properties of few-layer Td-MoTe2
T. Wakamura, M. Hashisaka, M. Bard, S. Okazaki, T. Sasagawa, T. Taniguchi, K. Watanabe, K. Muraki, and N. Kumada
EP2DS-25/MSS-21
- Time-resolved helical edge transport in the quantum Hall regime of electron-hole bilayer systems
H. Kamata, H. Irie, S. Sasaki, N. Kumada, and K. Muraki
EP2DS-25/MSS-21
- Bias-induced decoherence in a Mach-Zehnder interferometer consisting of spinresolved copropagating edge channels
T. Shimizu, M. Hashisaka, E. Iyoda, A. Endo, S. Katsumoto, and N. Kumada
EP2DS-25/MSS-21
- Superconductor/semiconductor junction using a cleaved edge surface of an InAs/AlGaSb quantum-well wafer
T. Akiho, H. Irie, Y. Nakazawa, S. Sasaki, N. Kumada, and K. Muraki
EP2DS-25/MSS-21
- Effects of GaAs buffer layer on MBE-grown quantum anomalous Hall insulator V_y(Bi_x Sb_1-x)_2-yTe_3
Yusuke Nakazawa, Takafumi Akiho, Kiyoshi Kanisawa, Hiroshi Irie, Norio Kumada, and Koji Muraki
EP2DS-25/MSS-21
- Excitonic nature of magnons in a quantum Hall ferromagnet (Invited)
A. Assouline, M. Jo, P. Brasseur, K. Watanabe, T. Taniguchi, Th. Jolicoeur, D. C. Glattli, N. Kumada, P. Roche, F. D. Parmentier, and P. Roulleau
EP2DS-25/MSS-21
- Emission and coherent control of Levitons in graphene
A. Assouline, L. Pugliese, H. Chakraborti1, Seunghun Lee, L. Bernabeu, M. Jo, K. Watanabe,T. Taniguchi, D.C. Glattli, N. Kumada, H.-S. Sim, F.D. Parmentier, and P. Roulleau
EP2DS-25/MSS-21
- Tracking Ultrafast Photocurrent Generation and Transport in hBN-Encapsulated Graphene Using On-Chip THz Spectroscopy
K. Yoshioka, T. Wakamura, M. Hashisaka, K. Watanabe, T. Taniguchi, and N. Kumada
IRMMW 2022
- Time-resolved measurement of edge magnetoplasmon transport in electron-hole bilayer systems
Hiroshi Kamata, H. Irie, S. Sasaki, N. Kumada, and K. Muraki
LT29
- Giant Nonreciprocal Charge Transport in Superconducting Few-layer Td-MoTe2
Taro Wakamura, Masayuki Hashisaka, Shota Okazaki, Takao Sasagawa, Kenji Watanabe, Takashi Taniguchi, Koji Muraki, Norio Kumada
LT29
- A hallmark of disordered reconstructededge transport at a fractional-integer quantum Hall junction
Masayuki Hashisaka, Takuya Ito, Takafumi Akiho, Satoshi Sasaki, Norio Kumada, Naokazu Shibata, Koji Muraki
LT29
- Excitonic nature of magnons in a quantum Hall ferromagnet
Preden Roulleau, Myunglae Jo, Genevieve Fleury, Heung-Sun Sim, Thierry Jolicoeur, Takasi Taniguchi, Patrice Roche, Christian Glattli, Norio Kumada
LT29
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