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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, CX2 1
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
2013 Impact Factor: 3.664
2013 SCImago Journal Rankings: 2.143
 
DOIhttp://dx.doi.org/10.1103/PhysRevB.77.125345
 
ISI Accession Number IDWOS:000254543000117
 
ReferencesReferences in Scopus
 
DC FieldValue
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
2013 Impact Factor: 3.664
2013 SCImago Journal Rankings: 2.143
 
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
 
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<contributor.author>Zhou, B</contributor.author>
<contributor.author>Shen, SQ</contributor.author>
<contributor.author>Zhu, BF</contributor.author>
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<description.abstract>We 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. &#169; 2008 The American Physical Society.</description.abstract>
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Author Affiliations
  1. The University of Hong Kong
  2. Tsinghua University