RKKY interaction in framework of T=0 Green function method

Details RKKY interaction in framework of T=0 Green function method RKKY interaction in framework of T=0 Green function method

2003-01-28

arxiv.org/abs/cond-mat/0301548v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, no figures, methodical paper

Scientific paper

A methodical derivation of RKKY interaction in framework of T=0 Green function method is given in great detail. The article is complimentary to standard textbooks on the physics of magnetism and condensed matter physics. It is shown that the methods of statistical mechanics gives a standard and probably simplest derivation of the exchange interaction. A parallel with theory of plasma waves demonstrates the relation between the Fourier transformation of polarization operator of degenerate electron gas at zero frequency and the space dependence of the indirect electron exchange due to itinerant electrons.

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