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cond-mat.str-el2004
Quarter-filled extended Hubbard model with alternating transfer integral: Two-dimensional Ising transition in the ground state
Hiromi Otsuka, Masaaki Nakamura
We study the one-dimensional quarter-filled extended Hubbard model with an alternating transfer integral. In the strong-dimerization limit the charge part is described by the quant…
cond-mat.str-el2004
Ground-state phase diagram of the one-dimensional Hubbard-model with an alternating potential
Hiromi Otsuka, Masaaki Nakamura
We investigate the ground-state phase diagram of the one-dimensional half-filled Hubbard model with an alternating potential--a model for the charge-transfer organic materials and…