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Anisotropic conductivity of disordered two-dimensional electron gases due to spin-orbit interactions

Chalaev, Oleg and Loss, Daniel. (2008) Anisotropic conductivity of disordered two-dimensional electron gases due to spin-orbit interactions. Physical Review B, Vol. 77, H. 11 , 115352, 7 S..

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Official URL: http://edoc.unibas.ch/dok/A5254609

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Abstract

We show that the disorder-averaged conductivity tensor of a disordered two-dimensional electron gas becomes anisotropic in the presence of both Rashba and Dresselhaus spin-orbit interactions (SOIs). This anisotropy is a mesoscopic effect and vanishes with vanishing charge dephasing time. Using a diagrammatic approach including zero-, one-, and two-loop diagrams, we show that a consistent calculation needs to go beyond a Boltzmann equation approach. In the absence of charge dephasing and for zero frequency, a finite anisotropy sigma(xy)alpha e(2)/pF(lh) arises even for infinitesimal SOI, where pF is the Fermi momentum and l is the mean free path of an electron.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0163-1829
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:48

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