Article: Current-induced spin polarization in a two-dimensional hole gas

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TitleCurrent-induced spin polarization in a two-dimensional hole gas
AuthorsLiu, CX1 2
Zhou, B1
Shen, SQ1
Zhu, BF2
Issue Date2008
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
CitationPhysical Review B - Condensed Matter And Materials Physics, 2008, v. 77 n. 12 [How to Cite?]
DOI: http://dx.doi.org/10.1103/PhysRevB.77.125345
AbstractWe investigate the current-induced spin polarization in the two-dimensional hole gas (2DHG) with the structure inversion asymmetry. By using the perturbation theory, we rederive the effective k -cubic Rashba Hamiltonian for 2DHG and the generalized spin operators accordingly. Then based on the linear response theory, we analytically and numerically calculate the current-induced spin polarization with the disorder effect considered. We have found that, quite different from the two-dimensional electron gas, the spin polarization in 2DHG linearly depends on Fermi energy in the low-doping regime, and with increasing Fermi energy, the spin polarization may be suppressed and even changes its sign. We predict a pronounced peak of the spin polarization in 2DHG once the Fermi level is somewhere between the minimum points of two spin-split branches of the lowest light-hole subband. We discuss the possibility of measurements in experiments as regards the temperature and the width of quantum wells. © 2008 The American Physical Society.
ISSN1098-0121
2011 Impact Factor: 3.691
2011 SCImago Journal Rankings: 0.268
DOIhttp://dx.doi.org/10.1103/PhysRevB.77.125345
ISI Accession Number IDWOS:000254543000117
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorLiu, CX
dc.contributor.authorZhou, B
dc.contributor.authorShen, SQ
dc.contributor.authorZhu, BF
dc.date.accessioned2010-09-06T08:10:05Z
dc.date.available2010-09-06T08:10:05Z
dc.date.issued2008
dc.description.abstractWe investigate the current-induced spin polarization in the two-dimensional hole gas (2DHG) with the structure inversion asymmetry. By using the perturbation theory, we rederive the effective k -cubic Rashba Hamiltonian for 2DHG and the generalized spin operators accordingly. Then based on the linear response theory, we analytically and numerically calculate the current-induced spin polarization with the disorder effect considered. We have found that, quite different from the two-dimensional electron gas, the spin polarization in 2DHG linearly depends on Fermi energy in the low-doping regime, and with increasing Fermi energy, the spin polarization may be suppressed and even changes its sign. We predict a pronounced peak of the spin polarization in 2DHG once the Fermi level is somewhere between the minimum points of two spin-split branches of the lowest light-hole subband. We discuss the possibility of measurements in experiments as regards the temperature and the width of quantum wells. © 2008 The American Physical Society.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2008, v. 77 n. 12 [How to Cite?]
DOI: http://dx.doi.org/10.1103/PhysRevB.77.125345
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.77.125345
dc.identifier.hkuros145579
dc.identifier.isiWOS:000254543000117
dc.identifier.issn1098-0121
2011 Impact Factor: 3.691
2011 SCImago Journal Rankings: 0.268
dc.identifier.issue12
dc.identifier.openurl
dc.identifier.scopuseid_2-s2.0-41549142211
dc.identifier.urihttp://hdl.handle.net/10722/80771
dc.identifier.volume77
dc.languageeng
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
dc.publisher.placeUnited States
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physics
dc.relation.referencesReferences in Scopus
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.
dc.titleCurrent-induced spin polarization in a two-dimensional hole gas
dc.typeArticle
Author Affiliations
  1. The University of Hong Kong
  2. Tsinghua University