High-temperature Aharonov-Bohm-Casher interferometer
arXiv:1110.6520 · doi:10.1103/PhysRevB.85.075422
Abstract
We study theoretically the combined effect of the spin-orbit and Zeeman interactions on the tunneling electron transport through a single-channel quantum ring threaded by magnetic flux. We focus on the high temperature case (temperature is much higher than the level spacing in the ring) and demonstrate that spin-interference effects are not suppressed by thermal averaging. In the absence of the Zeeman coupling the high-temperature tunneling conductance of the ring exhibits two types of oscillations: Aharonov-Bohm oscillations with magnetic flux and Aharonov-Casher oscillations with the strength of the spin-orbit interaction. For weak tunneling coupling both oscillations have the form of sharp periodic antiresonances. In the vicinity of the antiresonances the tunneling electrons acquire spin polarization, so that the ring serves as a spin polarizer. We also demonstrate that the Zeeman coupling leads to appearance of two additional peaks both in the tunneling conductance and in the spin polarization.
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Cited by in corpus (7)
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- Real-time dynamics of spin-dependent transport through a double-quantum-dot Aharonov-Bohm interferometer with spin-orbit interaction
- Coherent spin transport through helical edge states of topological insulator
- DC spin generation by junctions with AC driven spin-orbit interaction
- Tunneling Aharonov-Bohm interferometer on helical edge states
- Photovoltaic effect generated by spin-orbit interactions