Recent works
>>Japanese
Since 7. 2007
    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