Physcial Properties of SuperconductorNo Access

TWO-DIMENSIONAL QUARTER-FILLED EXTENDED HUBBARD MODEL AT STRONG COUPLING

W. F. LEE

Department of Physics, Chinese University of Hong Kong, Hong Kong, China

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and

H. Q. LIN

Department of Physics, Chinese University of Hong Kong, Hong Kong, China

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https://doi.org/10.1142/S0217979205028256Cited by:0 (Source: Crossref)

Abstract

In this paper, we generalized the perturbation approach to study the quasi-two-dimension extended Hubbard model. This model is characterizing by intra-chain electron hopping t, on-site Column interaction U, nearest-neighbor interaction V, and inter-chain electron hopping t′ and nearest-neighbor interaction V′. An effective Hamiltonian up to sixth-order in t/U, t/V, t/V′, t′/U, t′/V and t′/V′ expansion was obtained and the spin-spin correlation functions were calculated. We presented results for t=t′, V=V′.

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References

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TWO-DIMENSIONAL QUARTER-FILLED EXTENDED HUBBARD MODEL AT STRONG COUPLING

Abstract

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