Effect of in-plane magnetic field on the spin Hall effect in a Rashba-Dresselhaus system

研究成果: 雜誌貢獻文章

42 引文 (Scopus)

摘要

In a two-dimensional electron gas with Rashba and Dresselhaus spin-orbit couplings, there are two spin-split energy surfaces connected with a degenerate point. Both the energy surfaces and the topology of the Fermi surfaces can be varied by an in-plane magnetic field. We find that, if the chemical potential falls between the bottom of the upper band and the degenerate point, then simply by changing the direction of the magnetic field, the magnitude of the spin Hall conductivity can be varied by about 100 percent. Once the chemical potential is above the degenerate point, the spin Hall conductivity becomes the constant e/8π, independent of the magnitude and direction of the magnetic field. In addition, we find that the in-plane magnetic field exerts no influence on the charge Hall conductivity.

原文英語
文章編號085315
期刊Physical Review B - Condensed Matter and Materials Physics
71
發行號8
DOIs
出版狀態已發佈 - 2005 二月 1

指紋

Spin Hall effect
Hall effect
Magnetic fields
Chemical potential
Interfacial energy
magnetic fields
conductivity
surface energy
Two dimensional electron gas
Fermi surface
Fermi surfaces
electron gas
Orbits
topology
Topology
orbits

ASJC Scopus subject areas

  • Condensed Matter Physics

引用此文

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AB - In a two-dimensional electron gas with Rashba and Dresselhaus spin-orbit couplings, there are two spin-split energy surfaces connected with a degenerate point. Both the energy surfaces and the topology of the Fermi surfaces can be varied by an in-plane magnetic field. We find that, if the chemical potential falls between the bottom of the upper band and the degenerate point, then simply by changing the direction of the magnetic field, the magnitude of the spin Hall conductivity can be varied by about 100 percent. Once the chemical potential is above the degenerate point, the spin Hall conductivity becomes the constant e/8π, independent of the magnitude and direction of the magnetic field. In addition, we find that the in-plane magnetic field exerts no influence on the charge Hall conductivity.

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