Ab-initio methods for spin-transport at the nanoscale level

Details Ab-initio methods for spin-transport at the nanoscale level Ab-initio methods for spin-transport at the nanoscale level

2005-03-17

arxiv.org/abs/cond-mat/0503445v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

To be published in "Handbook of Computational Nanotechnology" (American Scientific Publishers, California 2004). Full text, al

Scientific paper

Recent advances in atomic and nano-scale growth and characterization techniques have led to the production of modern magnetic materials and magneto-devices which reveal a range of new fascinating phenomena. The modeling of these is a tough theoretical challenging since one has to describe accurately both electronic structure of the constituent materials, and their transport properties. In this paper I review recent advances in modeling spin-transport at the atomic scale using first-principles methods, focusing both on the methodological aspects and on the applications. The review, which is designed as tutorial for students at postgraduate level, is structured in six main sections: 1) Introduction, 2) General concepts in spin-transport, 3) Transport Theory: Linear Response, 4) Transport Theory: Non-equilibrium Transport, 5) Results, 6) Conclusion. In addition an overview of the computational codes available to date is also included.

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