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Spin-splitting enhanced by many-body effects in a two-dimensional electron gas in the presence of the Rashba spin-orbit interaction

Xu, Wen; Yang, C.H.; Zeng, Z.; Tang, C S

Description

We present a theoretical study on how many-body effects, especially the exchange interaction, can affect the spin-splitting of a two-dimensional electron gas (2DEG) in the presence of the Rashba spin-orbit interaction. The standard Hartree-Fock approximation and Green's function approach are employed to calculate self-consistently the energy spectrum and density of states of a spin-split 2DEG realized from an InGaAs/InAlAs heterojunction. We find that although the Hartree interaction affects...[Show more]

dc.contributor.authorXu, Wen
dc.contributor.authorYang, C.H.
dc.contributor.authorZeng, Z.
dc.contributor.authorTang, C S
dc.date.accessioned2015-12-07T22:46:47Z
dc.identifier.issn0953-8984
dc.identifier.urihttp://hdl.handle.net/1885/25923
dc.description.abstractWe present a theoretical study on how many-body effects, especially the exchange interaction, can affect the spin-splitting of a two-dimensional electron gas (2DEG) in the presence of the Rashba spin-orbit interaction. The standard Hartree-Fock approximation and Green's function approach are employed to calculate self-consistently the energy spectrum and density of states of a spin-split 2DEG realized from an InGaAs/InAlAs heterojunction. We find that although the Hartree interaction affects rather weakly the self-energy of a quasi-particle, the presence of the exchange (Fock) interaction can significantly enhance the spin-splitting of a 2DEG on top of the Rashba effect. The main physical reasons for this important phenomenon are examined and discussed.
dc.publisherInstitute of Physics Publishing
dc.sourceJournal of Physics: Condensed Matter
dc.subjectKeywords: Approximation theory; Carrier concentration; Green's function; Heterojunctions; Hartree-Fock approximation; Quasi-particle; Rashba spin-orbit; Electron gas
dc.titleSpin-splitting enhanced by many-body effects in a two-dimensional electron gas in the presence of the Rashba spin-orbit interaction
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume18
dc.date.issued2006
local.identifier.absfor020405 - Soft Condensed Matter
local.identifier.ariespublicationu4441299xPUB41
local.type.statusPublished Version
local.contributor.affiliationXu, Wen, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationYang, C.H., Chinese Academy of Sciences
local.contributor.affiliationZeng, Z., Chinese Academy of Sciences
local.contributor.affiliationTang, C S, Taiwan National Centre for Theoretical Sciences
local.description.embargo2037-12-31
local.bibliographicCitation.issue27
local.bibliographicCitation.startpage6201
local.bibliographicCitation.lastpage6212
local.identifier.doi10.1088/0953-8984/18/27/004
dc.date.updated2015-12-07T11:45:51Z
local.identifier.scopusID2-s2.0-33745500502
CollectionsANU Research Publications

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