312 citations · 5.8k across the 176 of their papers we have counts for
14 papers · 1 filter
Charge ratchet from spin flip: space-time symmetry paradox
Sergey Smirnov, Dario Bercioux, Milena Grifoni +1
Traditionally the charge ratchet effect is considered as a consequence of either the spatial symmetry breaking engineered by asymmetric periodic potentials, or time asymmetry of th…
Quantum Corrections to Fidelity Decay in Chaotic Systems
Boris Gutkin, Daniel Waltner, Martha Gutierrez +2
By considering correlations between classical orbits we derive semiclassical expressions for the decay of the quantum fidelity amplitude for classically chaotic quantum systems, as…
BCS superconductivity in metallic nanograins: Finite-size corrections, low energy excitations, and robustness of shell effects
Antonio M. Garcia-Garcia, Juan Diego Urbina, Emil A. Yuzbashyan +2
We combine the BCS self-consistency condition, a semiclassical expansion for the spectral density and interaction matrix elements to describe analytically how the superconducting g…
Spin Accumulation in Diffusive Conductors with Rashba and Dresselhaus Spin-Orbit Interaction
Mathias Duckheim, Daniel Loss, Matthias Scheid +3
We calculate the electrically induced spin accumulation in diffusive systems due to both Rashba (with strength and Dresselhaus (with strength spin-orbit interaction. Usin…
Semiclassical gaps in the density of states of chaotic Andreev billiards
Jack Kuipers, Daniel Waltner, Cyril Petitjean +2
The connection of a superconductor to a chaotic ballistic quantum dot leads to interesting phenomena, most notably the appearance of a hard gap in its excitation spectrum. Here we…
Classical Correlations and Quantum Interference in Ballistic Conductors
Daniel Waltner, Klaus Richter
We illustrate how classical chaotic dynamics influences the quantum properties at mesoscopic scales. As a model case we study semiclassically coherent transport through ballistic m…
Semiclassical approach to the ac-conductance of chaotic cavities
Cyril Petitjean, Daniel Waltner, Jack Kuipers +2
We address frequency-dependent quantum transport through mesoscopic conductors in the semiclassical limit. By generalizing the trajectory-based semiclassical theory of dc quantum t…
Single-spin polaron memory effect
Dmitry A. Ryndyk, Pino D'Amico, Klaus Richter
The single-spin memory effect is considered within a minimal polaron model describing a single-level quantum dot interacting with a vibron and weakly coupled to ferromagnetic leads…
Tunneling anisotropic magnetoresistance in Fe/GaAs/Au junctions: orbital effects
M. Wimmer, M. Lobenhofer, J. Moser +6
We report experiments on epitaxially grown Fe/GaAs/Au tunnel junctions demonstrating that the tunneling anisotropic magnetoresistance (TAMR) effect can be controlled by a magnetic…
Resonant tunneling-based spin ratchets
Matthias Scheid, Andreas Lassl, Klaus Richter
We outline a generic ratchet mechanism for creating directed spin-polarized currents in ac-driven double well or double dot structures by employing resonant spin transfer through t…
Anisotropic universal conductance fluctuations in disordered quantum wires with Rashba and Dresselhaus spin-orbit interaction and applied in-plane magnetic field
Matthias Scheid, Inanc Adagideli, Junsaku Nitta +1
We investigate the transport properties of narrow quantum wires realized in disordered two-dimensional electron gases in the presence of k-linear Rashba and Dresselhaus spin-orbit…
Extrinsic and intrinsic ratchet response of a quantum dissipative spin-orbit medium
Sergey Smirnov, Dario Bercioux, Milena Grifoni +1
Traditionally the charge ratchet effect is considered as a consequence of the extrinsic spatial asymmetry engineered by external asymmetric periodic potentials. Here we demonstrate…
Doppler Shift in Andreev Reflection from a Moving Superconducting Condensate in Nb/InAs Josephson Junctions
F. Rohlfing, G. Tkachov, F. Otto +4
We study narrow ballistic Josephson weak links in a InAs quantum wells contacted by Nb electrodes and find a dramatic magnetic-field suppression of the Andreev reflection amplitude…
All-electrical detection of the relative strength of Rashba and Dresselhaus spin-orbit interaction in quantum wires
Matthias Scheid, Makoto Kohda, Yoji Kunihashi +2
We propose a method to determine the relative strength of Rashba and Dresselhaus spin-orbit interaction from transport measurements without the need of fitting parameters. To this…