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Validity of t–J approximation for extended Hubbard model with strong repulsion

It is shown that for finite cyclic systems described by two band Hubbard Hamiltonian with strong electron repulsion the reduction to effective t–J model may give incorrect description of the ground state symmetry due to neglect of the correlated hopping terms.

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Bibliographic Details
Main Authors: Cheranovskii, V.O., Klein, D.J., Ezerskaya, E.V., Tokarev, V.V.
Format: Article
Language:English
Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2017
Series:Физика низких температур
Subjects:
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/175320
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