Influence of Impurity Spin Dynamics on Quantum Transport in Epitaxial Graphene
Journal article, 2015

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-parallel to, and thereby proving that it is caused at least in part by spinful scatterers. A nonmonotonic dependence of the effective decoherence rate on B-parallel to 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.

Author

Samuel Lara Avila

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Sergey Kubatkin

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

O. Kashuba

J. A. Folk

S. Luscher

R. Yakimova

Tjbm Janssen

A.Y. Tzalenchuk

V. Fal'ko

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 115 10 106602-

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (FP7), 2013-10-01 -- 2016-03-31.

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Materials Engineering

Physical Sciences

DOI

10.1103/PhysRevLett.115.106602

More information

Created

10/7/2017