[en] This paper discusses two dual approaches to spin transport in magnetic multilayers: a direct, purely quantum, approach based on a tight-binding (TB) model and a semiclassical approach [continuous random matrix theory CRMT]. The combination of both approaches provides a systematic way to perform multiscale simulations of systems that contain relevant physics at scales larger (spin accumulation, spin diffusion) and smaller (specular reflexions, tunneling) than the elastic mean free paths of the layers. We show explicitly that CRMT and TB give consistent results in their common domain of applicability.
Disciplines :
Physics
Author, co-author :
Borlenghi, Simone; CEA Saclay, Serv Phys Etat Condense, Nanoelect Grp, F-91191 Gif Sur Yvette, France.
Rychkov, Valentin; CEA Saclay, Serv Phys Etat Condense, Nanoelect Grp, F-91191 Gif Sur Yvette, France.
Petitjean, Cyril ; Université de Liège - ULiège > Département de physique > Physique quantique statistique
Waintal, Xavier; CEA Saclay, Serv Phys Etat Condense, Nanoelect Grp, F-91191 Gif Sur Yvette, France.
Language :
English
Title :
Multiscale approach to spin transport in magnetic multilayers
Publication date :
2011
Journal title :
Physical Review. B, Condensed Matter and Materials Physics
ISSN :
1098-0121
eISSN :
1550-235X
Publisher :
Amer Physical Soc, College Pk, United States - Maryland
Volume :
84
Issue :
3
Pages :
035412-16
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
EC [IST-033749, ICT-257159 MACALO] DynaMax CEA NanoSim program CEA Eurotalent
Commentary :
We thank T. Valet, A. Fert, H. Jaffres, G. Bauer, and A. Brataas for valuable discussions. This work was supported by EC Contract No. IST-033749 DynaMax, CEA NanoSim program, CEA Eurotalent, and EC Contract No. ICT-257159 MACALO.
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