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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Date
2007
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
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/
Keywords
PHASE, OSCILLATIONS, SPINTRONICS, SPECTRUM, Physics
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."