Spin-dependent refraction at the atomic step of transition-metal dichalcogenides

Tetsuro Habe, Mikito Koshino

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We theoretically propose a spin-dependent electronic transport mechanism in which the spin-unpolarized electron beam is split into different directions depending on spins at an atomic domain boundary in nonmagnetic material. Specifically, we calculate the electronic transmission across a boundary between the monolayer and bilayer of the transition-metal dichalcogenide, and demonstrate that up-spin and down-spin electrons entering the boundary are refracted and collimated to opposite directions. The phenomenon is attributed to the strong spin-orbit interaction, the trigonally warped Fermi surface, and the different crystal symmetries between the monolayer and bilayer systems. The spin-dependent refraction suggests a potential application for a spin splitter, which spatially separates up-spin and down-spin electrons simply by passing the electric current through the boundary.

Original languageEnglish
Article number201407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number20
DOIs
Publication statusPublished - 2015 May 18

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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