TY - JOUR

T1 - Influence of Impurity Spin Dynamics on Quantum Transport in Epitaxial Graphene

AU - Lara-Avila, Samuel

AU - Kubatkin, Sergey

AU - Kashuba, Oleksiy Mykolayovych

AU - Folk, Joshua

AU - Luscher, Silvia

AU - Yakimova, Rositza

AU - Janssen, T. J. B. M.

AU - Tzalenchuk, Alexander

AU - Falko, Vladimir

PY - 2015/9/3

Y1 - 2015/9/3

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.115.106602

DO - 10.1103/PhysRevLett.115.106602

M3 - Journal article

VL - 115

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 10

M1 - 106602

ER -