2002
DOI: 10.12693/aphyspola.101.549
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Extended Hubbard Model in the Dimer Representation. II. Lattice Hamiltonian in the Large U Limit

Abstract: U si ng the exact decompositio n of the sc lattice into a set of inte racting dimers (each dimer is descri bed by the extended H ubbard H amiltonian ) and exact solution of the dimer problem (preceding paper) we exactly Ùnd the form of the extended H ubbard mo del in the case of a crystal in the large U limit . We apply a new , nonp erturba ti v e approach based on the exact pro j ection pro cedure onto a dimer subspace occupied by electrons in this limit (it is the only assumption). T he resulting H amiltonia… Show more

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