arXiv subjects

Peter A. Ivanov

Publications and source records attributed to Peter A. Ivanov.

38 records · Page 3Linked to original sources

arXiv2008

Plasmon spectrum of degenerated electron gas. T=0 Green function method. Detailed pedagogical derivation

Plasmon spectrum and polarization operator of 1, 2, and 3 dimensional electron gas are calculated by T=0 Green function technique. It is shown that this field theory method gives probably the simplest pedagogical derivation of the statistical problem for the response function. The explanation is complimentary to the standard courses on condensed matter and plasma physics of the level of IX volume of Landau-Lifshitz encyclopedia on theoretical physics.

cond-mat.stat-mech↗

arXiv2003

RKKY interaction in framework of T=0 Green function method

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.

cond-mat.stat-mech↗