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28 March 2024
 
  » arxiv » 1507.3841

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Influence of impurity spin dynamics on quantum transport in epitaxial graphene
Samuel Lara-Avila ; Sergey Kubatkin ; Oleksiy Kashuba ; Joshua A. Folk ; Silvia Lüscher ; Rositza Yakimova ; T.J.B.M. Janssen ; Alexander Tzalenchuk ; Vladimir Fal'ko ;
Date 14 Jul 2015
AbstractExperimental evidence from both spin-valve and quantum transport measurements points towards unexpectedly fast spin relaxation in graphene. We report magnetotransport studies of epitaxial graphene on SiC in a vector magnetic field showing that spin relaxation, detected using weak-localisation analysis, is suppressed by an in-plane magnetic field, $B_{parallel}$, and thereby proving that it is caused at least in part by spinful scatterers. A non-monotonic dependence of effective decoherence rate on $B_{parallel}$ reveals the intricate role of scatterers’ spin dynamics in forming the interference correction to conductivity, an effect that has gone unnoticed in earlier weak localisation studies
Source arXiv, 1507.3841
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