Density-functional studies of spin-orbit splitting in graphene on metals

2010/08/04 by Z. Y. Li, Shuang Qiao, Li, Z. Y. +8
Materials Science · Physics and Astronomy · #Graphene research and applications #Magnetic properties of thin films #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.1008.0696

4 pages, 4 figures

arxiv created 2010/08/04 · arxiv updated 2010/08/05

Abstract

Spin-orbit splitting in graphene on Ni, Au, or Ag (111) substrates was examined on the basis of density-functional theory. Graphene grown on the three metals was found to have Rashba splitting of a few or several tens of meV. The strong splitting obtained on Au or Ag substrates was mainly ascribed to effective hybridization of graphene p_z state with Au or Ag d_z² states, rather than charge transfer as previously proposed. Our work provides theoretical understandings of the metal-induced Rashba effect in graphene.

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