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TMF, 1989, Volume 81, Number 3, Pages 434–440 (Mi tmf5383)  

Feromagnetism in the single-band Hubbard model in the limit of strong correlations

B. M. Letfulov


Abstract: A thermodynamic potential of the single-band strong correlation Hubbard model is calculated by means of diagram technique in a two-loop approximation. Some features of diagram technique for Hubbard $X$-operators are discussed. It is shown that, in the case of almost half-filled band, the system tends to be paramagnetically unstable. The dependence of extrapolation Curie temperatures on hole concentration is given.

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English version:
Theoretical and Mathematical Physics, 1989, 81:3, 1314–1319

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Received: 27.04.1988

Citation: B. M. Letfulov, “Feromagnetism in the single-band Hubbard model in the limit of strong correlations”, TMF, 81:3 (1989), 434–440; Theoret. and Math. Phys., 81:3 (1989), 1314–1319

Citation in format AMSBIB
\Bibitem{Let89}
\by B.~M.~Letfulov
\paper Feromagnetism in~the single-band Hubbard model in~the limit of~strong correlations
\jour TMF
\yr 1989
\vol 81
\issue 3
\pages 434--440
\mathnet{http://mi.mathnet.ru/tmf5383}
\transl
\jour Theoret. and Math. Phys.
\yr 1989
\vol 81
\issue 3
\pages 1314--1319
\crossref{https://doi.org/10.1007/BF01018960}
\isi{http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&DestLinkType=FullRecord&DestApp=ALL_WOS&KeyUT=A1989DP21300008}


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  • Теоретическая и математическая физика Theoretical and Mathematical Physics
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