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Nature of magnetization and lateral spin-orbit interaction in gated semiconductor nanowires
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
2018 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 30, no 21, article id 215302Article in journal (Refereed) Published
Abstract [en]

Semiconductor nanowires are interesting candidates for realization of spintronics devices. In this paper we study electronic states and effects of lateral spin-orbit coupling (LSOC) in a one-dimensional asymmetrically biased nanowire using the Hartree-Fock method with Dirac interaction. We have shown that spin polarization can be triggered by LSOC at finite source-drain bias,as a result of numerical noise representing a random magnetic field due to wiring or a random background magnetic field by Earth magnetic field, for instance. The electrons spontaneously arrange into spin rows in the wire due to electron interactions leading to a finite spin polarization. The direction of polarization is, however, random at zero source-drain bias. We have found that LSOC has an effect on orientation of spin rows only in the case when source-drain bias is applied.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2018. Vol. 30, no 21, article id 215302
Keywords [en]
quantum wire; quantum transport; lateral spin-orbit interaction; modelling; Hartree-Fock method
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-147904DOI: 10.1088/1361-648X/aabc15ISI: 000431423400002PubMedID: 29623898OAI: oai:DiVA.org:liu-147904DiVA, id: diva2:1209624
Note

Funding Agencies|Carl Trygger Science Foundation of Sweden

Available from: 2018-05-23 Created: 2018-05-23 Last updated: 2018-05-23

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Karlsson, H.Yakymenko, IrynaBerggren, Karl-Fredrik
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