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A strategy to create spin-split metallic bands on silicon using a dense alloy layer

AuthorsGruznev, Dimitry V.; Eremeev, S. V.; Chulkov, Eugene V. ; Saranin, A. A.
Issue Date2014
PublisherNature Publishing Group
CitationScientific Reports 4: 4742 (2014)
AbstractTo exploit Rashba effect in a 2D electron gas on silicon surface for spin transport, it is necessary to have surface reconstruction with spin-split metallic surface-state bands. However, metals with strong spin-orbit coupling (e.g., Bi, Tl, Sb, Pt) induce reconstructions on silicon with almost exclusively spin-split insulating bands. We propose a strategy to create spin-split metallic bands using a dense 2D alloy layer containing a metal with strong spin-orbit coupling and another metal to modify the surface reconstruction. Here we report two examples, i.e., alloying Bi/Si(111) √3 × √3 reconstruction with Na and Tl/Si(111)1 × 1 reconstruction with Pb. The strategy provides a new paradigm for creating metallic surface state bands with various spin textures on silicon and therefore enhances the possibility to integrate fascinating and promising capabilities of spintronics with current semiconductor technology.
DescriptionThis work is licensed under a Creative Commons Attribution-NonCommercialNoDerivs 3.0 Unported License.-- et al.
Publisher version (URL)http://dx.doi.org/10.1038/srep04742
Identifiersdoi: 10.1038/srep04742
issn: 2045-2322
Appears in Collections:(CFM) Artículos
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