High field and Coulomb interaction effects on spin injection in degenerate semiconductors

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High field and Coulomb interaction effects on spin injection in degenerate semiconductors

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Title: High field and Coulomb interaction effects on spin injection in degenerate semiconductors
Author: D'Amico, Irene; Vignale, Giovanni, 1957-
Keywords: spin polrarized transport in semiconductors
Date: 2004-03-12
Publisher: Institute of Physics
Citation: Irene D'Amico and Giovanni Vignale 2004 Semicond. Sci. Technol. 19 S383
Abstract: We analyse the combined effect of high electric field and Coulomb interaction on spin transport in semiconductors. We concentrate on the experimentally relevant regime characterized by T lap TF (intermediate to degenerate), where TF = εF/kB is the Fermi temperature. By the careful analysis of the downstream spin diffusion length Ld, we (i) demonstrate that in this regime carrier-carrier interactions become important and (ii) introduce the 'semiconductor degenerate' regime, in which spin-transport properties of a degenerate semiconductor are substantially modified by applying a modest electric field. Finally we discuss how the electric field and Coulomb interaction concur to influence the magnetoresistance of a trilayer system.
URI: http://hdl.handle.net/10355/7787
ISSN: 0268-1242

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