276 citations · 1.6k across the 34 of their papers we have counts for
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Dynamic Nuclear Polarization in a Quantum Hall Corbino Disk
Minoru Kawamura, Hiroyuki Takahashi, Satoru Masubuchi +4
Electrical polarization of nuclear spins is studied in a Corbino disk under a breakdown regime of the quantum Hall effect (QHE). Since the edge channels are completely absent in th…
Kondo effect in a semiconductor quantum dot coupled to ferromagnetic electrodes
K. Hamaya, M. Kitabatake, K. Shibata +7
Using a laterally-fabricated quantum-dot (QD) spin-valve device, we experimentally study the Kondo effect in the electron transport through a semiconductor QD with an odd number of…
Dynamic nuclear polarization and Knight shift measurements in a breakdown regime of integer quantum Hall effect
M. Kawamura, H. Takahashi, S. Masubuchi +4
Nuclear spins are polarized electrically in a breakdown regime of an odd-integer quantum Hall effect (QHE). Electron excitation to the upper Landau subband with the opposite spin p…
Electric-field control of tunneling magnetoresistance effect in a Ni/InAs/Ni quantum-dot spin valve
K. Hamaya, M. Kitabatake, K. Shibata +6
We demonstrate an electric-field control of tunneling magnetoresistance (TMR) effect in a semiconductor quantum-dot (QD) spin-valve device. By using ferromagnetic Ni nano-gap elect…
Electrical coherent control of nuclear spins in a breakdown regime of quantum Hall effect
H. Takahashi, M. Kawamura, S. Masubuchi +4
Using a conventional Hall-bar geometry with a micro-metal strip on top of the surface, we demonstrate an electrical coherent control of nuclear spins in an AlGaAs/GaAs semiconducto…