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Method of anomalous Green's functions: Antiferromagnetism in the Hubbard model on a triangular lattice

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Abstract

A method is proposed for describing antiferromagnetic and ferromagnetic states on a triangular lattice in the formalism of anomalous temperature-dependent Green's functions, for which equations of Dyson-Gor'kov type are formulated. These equations are solved in the Hartree approximation, and self-consistency equations are obtained for the order parameters. Finally, the connection between the considered theory and experiment is discussed.

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Authors
  1. K. N. Il'inskii
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  2. V. N. Popov
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deceased

St. Petersburg Branch of the V. A. Steklov Mathematics Institute, Russian Academy of Sciences. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 101, No. 2, pp. 294–303, November, 1994.

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Il'inskii, K.N., Popov, V.N. Method of anomalous Green's functions: Antiferromagnetism in the Hubbard model on a triangular lattice. Theor Math Phys 101, 1361–1367 (1994). https://doi.org/10.1007/BF01018284

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  • DOI: https://doi.org/10.1007/BF01018284

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