Influence of Impurity Spin Dynamics on Quantum Transport in Epitaxial Graphene
Artikel i vetenskaplig tidskrift, 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.

Författare

Samuel Lara Avila

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Sergey Kubatkin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

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)

Europeiska kommissionen (FP7), 2013-10-01 -- 2016-03-31.

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Materialteknik

Fysik

DOI

10.1103/PhysRevLett.115.106602