Validity of t–J approximation for extended Hubbard model with strong repulsion
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DOI: 10.1063/1.5010315
Abstract: 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… read more here.
Keywords: validity approximation; extended hubbard; model; approximation extended ... See more keywords