Kazuhiko Hirakawa

Best Publications

• Interface roughness scattering in GaAs/AlAs quantum wells

  H. Sakaki;T. Noda;K. Hirakawa;M. Tanaka

  880
  Citations

• Mobility of the two-dimensional electron gas at selectively doped n -type AlxGa1-xAs/GaAs heterojunctions with controlled electron concentrations.

  Kazuhiko Hirakawa;Hiroyuki Sakaki

  433
  Citations

• Intrinsic electron accumulation layers on reconstructed clean InAs(100) surfaces.

  M. Noguchi;K. Hirakawa;T. Ikoma

  321
  Citations

• Bound-to-continuum intersubband photoconductivity of self-assembled InAs quantum dots in modulation-doped heterostructures

  S.-W. Lee;K. Hirakawa;Y. Shimada

  303
  Citations

• Energy relaxation of two‐dimensional electrons and the deformation potential constant in selectively doped AlGaAs/GaAs heterojunctions

  K. Hirakawa;H. Sakaki

  211
  Citations

• Fabrication of graphene nanoribbon by local anodic oxidation lithography using atomic force microscope

  Satoru Masubuchi;Masashi Ono;Kenji Yoshida;Kazuhiko Hirakawa

  209
  Citations

• Machine-Learning-Optimized Aperiodic Superlattice Minimizes Coherent Phonon Heat Conduction

  Run Hu;Run Hu;Sotaro Iwamoto;Lei Feng;Shenghong Ju

  156
  Citations

• Single-photon detector in the microwave range

  O. Astafiev;S. Komiyama;T. Kutsuwa;V. Antonov

  155
  Citations

• MEMS reconfigurable metamaterial for terahertz switchable filter and modulator

  Zhengli Han;Kenta Kohno;Hiroyuki Fujita;Kazuhiko Hirakawa

  154
  Citations

• Far‐infrared emission spectroscopy of hot two‐dimensional plasmons in Al0.3Ga0.7As/GaAs heterojunctions

  K. Hirakawa;K. Yamanaka;M. Grayson;D. C. Tsui

  135
  Citations

• Kondo universal scaling for a quantum dot coupled to superconducting leads.

  Christo Buizert;Akira Oiwa;Kenji Shibata;Kazuhiro Hirakawa

  132
  Citations

• Mobility modulation of the two-dimensional electron gas via controlled deformation of the electron wave function in selectively doped AlGaAs-GaAs heterojunctions.

  K. Hirakawa;H. Sakaki;J. Yoshino

  129
  Citations

• Terahertz conductivity and possible BLOCH gain in semiconductor superlattices.

  Y Shimada;K Hirakawa;Maxim Odnoblioudov;Koung-An Chao

  126
  Citations

• Charge-sensitive infrared phototransistors : Characterization by an all-cryogenic spectrometer

  Takeji Ueda;Zhenghua An;Kazuhiko Hirakawa;Susumu Komiyama

  121
  Citations

• Phase coherence length of electron waves in narrow AlGaAs/GaAs quantum wires fabricated by focused ion beam implantation

  Toshiro Hiramoto;Kazuhiko Hirakawa;Yasuhiro Iye;Toshiaki Ikoma

  117
  Citations

• Gate-tunable large negative tunnel magnetoresistance in Ni-C60-Ni single molecule transistors.

  Kenji Yoshida;Ikutaro Hamada;Shuichi Sakata;Akinori Umeno

  112
  Citations

• Concentration of electrons in selectively doped GaAlAs/GaAs heterojunction and its dependence on spacer‐layer thickness and gate electric field

  K. Hirakawa;H. Sakaki;J. Yoshino

  112
  Citations

• Large Anisotropy of the Spin-Orbit Interaction in a Single InAs Self-Assembled Quantum Dot

  S. Takahashi;R. S. Deacon;K. Yoshida;A. Oiwa

  107
  Citations

• Electrically tuned spin–orbit interaction in an InAs self-assembled quantum dot

  Y. Kanai;R. S. Deacon;S. Takahashi;A. Oiwa

  104
  Citations

• Kondo-enhanced Andreev transport in single self-assembled InAs quantum dots contacted with normal and superconducting leads

  R. S. Deacon;Y. Tanaka;A. Oiwa;R. Sakano

  101
  Citations