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TT: Fachverband Tiefe Temperaturen
TT 14: TR: Graphene 2
TT 14.9: Vortrag
Dienstag, 23. März 2010, 11:45–12:00, H21
Spin relaxation of conduction electrons in Graphene induced by impurities — Martin Gradhand1, •Dmitry Fedorov2, Sergey Ostanin1, Igor Maznichenko2, Arthur Ernst1, Peter Zahn2, and Ingrid Mertig2,1 — 1Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany — 2Martin-Luther-Universität Halle, Institut für Physik, D-06099 Halle, Germany
Graphene is a very attractive system for future spintronics applications. Experiments [1,2] have shown unexpected fast spin relaxation of conduction electrons in Graphene. A probable explanation is based on the dominance of the Elliott-Yafet spin relaxation mechanism.
Recently, we have developed a fully relativistic ab initio approach, based on the Korringa-Kohn-Rostoker method, for a theoretical study of the Elliott-Yafet mechanism caused by impurities [3]. Here we present our calculations of the spin-flip scattering time in Graphene via the Elliott-Yafet mechanism and estimate the Dyakonov-Perel spin relaxation time.
[1] N. Tombros et al., Nature 448, 571 (2007)
[2] N. Tombros et al., Phys. Rev. Lett. 101, 046601 (2008)
[3] M. Gradhand et al., submitted to Phys. Rev. B (2009)
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