Giant mesoscopic spin Hall effect on surface of topological insulator
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classification
cond-mat.mes-hall
keywords
spinpotentialeffectgianthallinsulatormesoscopicsurface
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We study mesoscopic spin Hall effect on the surface of topological insulator with a step-function potential. The giant spin polarization induced by a transverse electric current is derived analytically by using McMillan method in the ballistic transport limit, which oscillates across the potential boundary with no confinement from the potential barrier due to the Klein paradox, and should be observable in spin resolved scanning tunneling microscope.
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