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Aharonov-Casher effect in a two-dimensional hole ring with spin-orbit interaction RID B-3617-2008 RID A-1315-2011

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Title: Aharonov-Casher effect in a two-dimensional hole ring with spin-orbit interaction RID B-3617-2008 RID A-1315-2011
Author: Kovalev, Alexey A.; Borunda, M. F.; Jungwirth, T.; Molenkamp, L. W.; Sinova, Jairo.
Abstract: We study the quantum interference effects induced by the Aharonov-Casher phase in a ring structure in a two-dimensional heavy-hole (HH) system with spin-orbit interaction realizable in narrow asymmetric quantum wells. The influence of the spin-orbit interaction strength on the transport is analytically investigated. These analytical results allow us to explain the interference effects as a signature of the Aharonov-Casher Berry phases. Unlike previous studies on electron two-dimensional Rashba systems, we find that the frequency of conductance modulations as a function of the spin-orbit strength is not constant but increases for larger spin-orbit splittings. In the limit of thin channel rings (width smaller than Fermi wavelength), we find that the spin-orbit splitting can be greatly increased due to the quantization in the radial direction. We also study the influence of a magnetic field considering both the limits of small and large Zeeman splittings.
Description: Journals published by the American Physical Society can be found at http://journals.aps.org/
Publisher: American Physical Society
Subject: PHASE
OSCILLATIONS
SPINTRONICS
SPECTRUM
Physics
Department: Physics and Astronomy
URI: http://dx.doi.org/10.1103/PhysRevB.76.125307
Date: 2007

Citation

Alexey A. Kovalev, M. F. Borunda, T. Jungwirth, L. W. Molenkamp and Jairo Sinova. Phys.Rev.B 76 125307 2007."Copyright (2007) by the American Physical Society."

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