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19 papers · 1 filter
Large anisotropy of spin-orbit interaction in a single InAs self-assembled quantum dot
S. Takahashi, R. S. Deacon, K. Yoshida +4
Anisotropy of spin-orbit interaction (SOI) is studied for a single uncapped InAs self-assembled quantum dot (SAQD) holding just a few electrons. The SOI energy is evaluated from an…
Fano-Kondo interplay in a side-coupled double quantum dot
S. Sasaki, H. Tamura, T. Akazaki +1
We investigate low-temperature transport characteristics of a side-coupled double quantum dot where only one of the dots is directly connected to the leads. We observe Fano resonan…
Single-Electron Tunneling and the Fluctuation Theorem
Y. Utsumi, D. S. Golubev, M. Marthaler +2
Experiments on the direction-resolved full-counting statistics of single-electron tunneling allow testing the fundamentally important Fluctuation Theorem (FT). At the same time, th…
Spin-polarized electric currents in quantum transport through tubular two-dimensional electron gases
O. Entin-Wohlman, A. Aharony, Y. Tokura +1
Scattering theory is employed to derive a Landauer-type formula for the spin and the charge currents, through a finite region where spin-orbit interactions are effective. It is sho…
A Cooper pair light emitting diode
H. Sasakura, S. Kuramitsu, Y. Hayashi +7
We demonstrate Cooper-pair's drastic enhancement effect on band-to-band radiative recombination in a semiconductor. Electron Cooper pairs injected from a superconducting electrode…
Wide-band capacitance measurement on a semiconductor double quantum dot for studying tunneling dynamics
Takeshi Ota, Toshiaki Hayashi, Koji Muraki +1
We propose and demonstrate wide-band capacitance measurements on a semiconductor double-quantum dot (DQD) to study tunneling dynamics. By applying phase-tunable high-frequency sign…