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Updated: Apr 3, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Influence of Impurity Spin Dynamics on Quantum Transport in Epitaxial Graphene
Samuel Lara-Avila1, Sergey Kubatkin1, Oleksiy Kashuba2
1Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg S-412 96, Sweden.
Abstract:
Experimental 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-localization analysis, is suppressed by an in-plane magnetic field B(∥), and thereby proving that it is caused at least in part by spinful scatterers. A nonmonotonic dependence of the effective decoherence rate on B(∥) reveals the intricate role of the scatterers' spin dynamics in forming the interference correction to the conductivity, an effect that has gone unnoticed in earlier weak localization studies.
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