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On the CPA treatment of magnetic disordered Hubbard model (I)

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Zeitschrift für Physik B Condensed Matter

Abstract

We treat a model based on the Hubbard hamitonian where the stochastic fields acting at the sites of the atoms can assume arbitrary directions and values. The averaging procedure introduced by Brandt et al. to study the behaviour of the magnetically disordered system is used for a model with stochastically localized magnetic fields at the atomic sites. The coherent potential approximation (CPA)-like method is employed and the resulting new effects for the density of states, localization function anddc conductivity are demonstrated in two cases.

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Author notes

  1. M. Pietruszka

    Present address: Institute of Physics and Chemistry of Metals, Silesian University, Bankowa 12, PL-400-07, Katowice, Poland

  2. W. Borgieł

    Present address: Institute of Physics, Silesian University, Uniwersytecka 4, PL-400-07, Katowice, Poland

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    1. M. Pietruszka
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    2. W. Borgieł
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    Pietruszka, M., Borgieł, W. On the CPA treatment of magnetic disordered Hubbard model (I). Z. Physik B - Condensed Matter 58, 99–103 (1985). https://doi.org/10.1007/BF01304260

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    • DOI: https://doi.org/10.1007/BF01304260

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