CPA density of states and conductivity in a double-exchange system containing impurities

M. Auslender; E. Kogari

doi:10.1007/s100510170298

CPA density of states and conductivity in a double-exchange system containing impurities

M. Auslender, E. Kogari

Department of Electrical & Computer Engineering

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We study density of states and conductivity of the doped double-exchange system, treating interaction of charge carriers both with the localized spins and with the impurities in the coherent potential approximation. It is shown that under appropriate conditions there is a gap between the conduction band and the impurity band in paramagnetic phase, while the density of states is gapless in ferromagnetic phase This can explain metal-insulator transition frequently observed in manganites and magnetic semiconductors. Activated conductivity in the insulator phase is numerically calculated.

Original language	English
Pages (from-to)	525-529
Number of pages	5
Journal	European Physical Journal B
Volume	19
Issue number	4
DOIs	https://doi.org/10.1007/s100510170298
State	Published - 2 Feb 2001

Keywords

72.10.-d Theory of electronic transport; scattering mechanisms
75.30.Vn Colossal magnetoresistance
75.50.Pp Magnetic semiconductors

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1007/s100510170298

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AU - Kogari, E.

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N2 - We study density of states and conductivity of the doped double-exchange system, treating interaction of charge carriers both with the localized spins and with the impurities in the coherent potential approximation. It is shown that under appropriate conditions there is a gap between the conduction band and the impurity band in paramagnetic phase, while the density of states is gapless in ferromagnetic phase This can explain metal-insulator transition frequently observed in manganites and magnetic semiconductors. Activated conductivity in the insulator phase is numerically calculated.

AB - We study density of states and conductivity of the doped double-exchange system, treating interaction of charge carriers both with the localized spins and with the impurities in the coherent potential approximation. It is shown that under appropriate conditions there is a gap between the conduction band and the impurity band in paramagnetic phase, while the density of states is gapless in ferromagnetic phase This can explain metal-insulator transition frequently observed in manganites and magnetic semiconductors. Activated conductivity in the insulator phase is numerically calculated.

KW - 72.10.-d Theory of electronic transport; scattering mechanisms

KW - 75.30.Vn Colossal magnetoresistance

KW - 75.50.Pp Magnetic semiconductors

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CPA density of states and conductivity in a double-exchange system containing impurities

Abstract

Keywords

ASJC Scopus subject areas

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