Low Temperature Physics: 37, 798 (2011); https://doi.org/10.1063/1.3670020 (5 pages)
Fizika Nizkikh Temperatur: Volume 37, Number 9-10 (September 2011), p. 1001-1007    ( to contents , go back )

Spontaneous spin polarization of impurity hybridized state systems of electrons in conduction band of crystals

V.I. Okulov

Institute of Metal Physics , S. Kovalevskoyi st. 18, Ekaterinburg 620990, Russia
E-mail: okulov@imp.uran.ru

E.A. Pamyatnykh

Ural State University, Ekaterinburg 620083, Russia

V.P. Silin

P.N. Lebedev Physical Institute, 53 Leninskii Ave., Moscow 119991, Russia
pos Анотація:

Received May 17, 2011

Abstract

The theoretical description of spontaneous spin polarization of electron hybridized state systems on donor impurities of low concentration in conduction band of a crystal has been developed. Based on general equations for spin splitting energy of electron spectrum, formulated within the scope of the Fermi-liquid approach, it has been shown that in such systems one occurs spin ordering mechanism of conduction electrons significantly more effective than the mechanism of exchange interaction with magnetic impurities, traditionally considered. The possibility of the realization of spontaneous spin ordering of electrons in hybridized states is substantiated within the scope of Fermiliquid constant model for the case of full polarization of a system. One discusses the possibilities of revealing the manifestations of spontaneous spin polarization of electron impurity system in thermodynamic properties (electron specific heat and elastic modulus). Analyzing available experimental data, the evidences of such manifestations are presented.

PACS: 72.20.Dp General theory, scattering mechanisms;
PACS: 72.20.Fr Low-field transport and mobility; piezoresistance;
PACS: 72.80.Ey III–V and II–VI semiconductors.

Key words: impurities in semiconductors, hybridized states, spin polarization of electrons, spin ordering, electron specific heat.

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