Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-01-22
Physical Review B 76, 125307 (2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, 4 figures
Scientific paper
10.1103/PhysRevB.76.125307
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 investigated analytically. These analytical results allow us to explain the interference effects as a signature of the Aharonov-Casher Berry phases. Unlike previous studies on the 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 quantization in the radial direction. We also study the influence of magnetic field considering both limits of small and large Zeeman splittings.
Borunda Mario F.
Jungwirth Tomas
Kovalev Alexey A.
Molenkamp Laurens W.
Sinova Jairo
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