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• W2314443332 abstract "We present a theoretical study of the optical generation of one-photon spin and current injection onto In-adsorbed Si(111) surfaces with $4ifmmodetimeselsetexttimesfi{}2$ and $8ifmmodetimeselsetexttimesfi{}2$ reconstructions. The spin injection, under incidence of circularly polarized light into nonmagnetic semiconductors, creates spin-polarized electrons in the conduction bands. The current injection is a nonlinear second-order effect that is allowed in materials without inversion symmetry. In bulk centrosymmetric crystals, the optical injection of current can only be observed at the surface wherein the inversion of symmetry might be broken. We report calculations for the degree of spin polarization and current-injection spectra which are calculated in a full electronic band structure scheme at the level of GW scissor-energy correction. Our results show an anisotropic behavior of the spin- and current-injection optical response. We obtain maximum percentages of the degree of spin polarization of 30% and 35% for the $4ifmmodetimeselsetexttimesfi{}2$ and $8ifmmodetimeselsetexttimesfi{}2$ surface reconstructions, respectively. It is also possible to optically generate injection current coming mainly from the first two top layers on both In-adsorbed surface reconstructions." @default.
• W2314443332 created "2016-06-24" @default.
• W2314443332 creator A5028190524 @default.
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• W2314443332 date "2014-11-24" @default.
• W2314443332 modified "2023-10-04" @default.
• W2314443332 title "Optical spin- and current-injection study on Si(111)-In surfaces" @default.
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• W2314443332 doi "https://doi.org/10.1103/physrevb.90.205310" @default.
• W2314443332 hasPublicationYear "2014" @default.
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