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8 papers · 2 filters
Pseudospin for Raman D Band in Armchair Graphene Nanoribbons
K. Sasaki, K. Kato, Y. Tokura +2
By analytically constructing the matrix elements of an electron-phonon interaction for the band in the Raman spectra of armchair graphene nanoribbons, we show that pseudospin a…
Spin-orbital Kondo effect in a parallel double quantum dot
Yuma Okazaki, Satoshi Sasaki, Koji Muraki
Transport properties of the two-orbital Kondo effect involving both spin and orbital (pseudospin) degrees of freedom were examined in a parallel double quantum dot with a sufficien…
Discrete-time quadrature feedback cooling of a radio-frequency mechanical resonator
M. Poot, S. Etaki, H. Yamaguchi +1
We have employed a feedback cooling scheme, which combines high-frequency mixing with digital signal processing. The frequency and damping rate of a 2 MHz micromechanical resonator…
Phase and amplitude of Aharonov-Bohm oscillations in nonlinear three-terminal transport through a double quantum dot
Toshihiro Kubo, Yuki Ichigo, Yasuhiro Tokura
We study three-terminal linear and nonlinear transport through an Aharonov-Bohm interferometer containing a double quantum dot using the nonequilibrium Green's function method. Und…
Filtering and analyzing mobile qubit information via Rashba-Dresselhaus-Aharonov-Bohm interferometers
Amnon Aharony, Yasuhiro Tokura, Guy Z. Cohen +2
Spin-1/2 electrons are scattered through one or two diamond-like loops, made of quantum dots connected by one-dimensional wires, and subject to both an Aharonov-Bohm flux and (Rash…
Observation of Hysteretic Transport Due to Dynamic Nuclear Spin Polarization in a GaAs Lateral Double Quantum Dot
Takashi Kobayashi, Kenichi Hitachi, Satoshi Sasaki +1
We report a new transport feature in a GaAs lateral double quantum dot that emerges only for magnetic field sweeps and shows hysteresis due to dynamic nuclear spin polarization (DN…