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Lecture Stephan Roche


23 October 2012 FWN-Building 5113.0202, Nijenborgh 4, 9747 AG, Groningen
Speaker: Prof. Dr. Stephan Roche
Affiliation: Catalan Institute of Nanotechnology-ICN, Barcelona, Spain
Title: Quantum transport in disordered graphene: From localization phenomena to spin relaxation mechanisms
Date: Tue Oct 23, 2012
Start: 11.00
Location: FWN-Building 5113.0202
Host: B.J. van Wees
Telephone: +31 50 363 4794


This presentation will address the broad tunability of quantum transport in disordered graphene (from polycrystalline graphene, defected and amorphous graphene, to functionalized graphene (hydrogenated or oxidized)), giving the typical transport length scales (mean free path, localization lengths) of interest, and showing in which circumstances pseudospin-related interference effects remain robust to a particular form of disorder. Next, the effects of spin-orbit coupling on spin relaxation mechanisms will be discussed, with reported anomalously short spin relaxation times (or lengths) in quasiballistic transport regimes. The applicability limits of Elliot-Yaffet and Dyakonov-Perel scaling relationships between spin relaxation and elastic scattering times to graphene will be outlined.

Last modified:22 October 2012 2.31 p.m.