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arXiv · 1709.04087

Giant Rashba-type spin splitting through spin-dependent interatomic-hopping

Jisook Hong·Jun-Won Rhim·Inkyung Song·Changyoung Kim·Seung Ryong Park·Ji Hoon Shim
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Abstract

We have performed density functional theory calculation and tight binging analysis in order to investigate the mechanism for the giant Rashba-type spin splitting (RSS) observed in Bi/Ag(111). We find that local orbital angular momentum induces momentum and spin dependent charge distribution which results in spin-dependent hopping. We show that the spin-dependent interatomic-hopping in Bi/Ag(111) works as a strong effective field and induces the giant RSS, indicating that the giant RSS is driven by hopping, not by a uniform electric field. The effective field from the hopping energy difference amounts to be ~18 V/{\AA}. This new perspective on the RSS gives us a hint for the giant RSS mechanism in general and should provide a strategy for designing new RSS materials by controlling spin-dependence of hopping energy between the neighboring atomic layers.

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Jisook Hong, Jun-Won Rhim, Inkyung Song, Changyoung Kim, Seung Ryong Park, Ji Hoon Shim. 2017-09-12. Giant Rashba-type spin splitting through spin-dependent interatomic-hopping. https://doi.org/10.7566/jpsj.88.124705

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