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Effective Interactions of the One-Dimensional d-p Model Based on the Luttinger Liquid Theory
Effective Interactions of the One-Dimensional d-p Model Based on the Luttinger Liquid Theory
Sano, Kazuhiro
7148
Ono, Yoshiaki
62
d-p model
electronic structure
Hubbard model
Luttinger liquid
t-J model
We examine effective interactions of the 1D d-p model mapped to a typical one-dimensional(1D) model such as the Hubbard model or the t-J model by the numerical diagonalization method combined with the Luttinger liquid theory. Analysis of the effective coupling constants of the mapped model gives the relationship between these models without ambiguity. We find that the renormalized interaction is relatively weak, though the repulsion of the d-p model at Cu-sites is very strong. We also find that the d-p model corresponds to not the t-J model but the Hubbard model for wide range of the parameters. It suggests that the Hubbard model is more favorable than the t-J model as a effective model of the d-p model in the low energy limit.
Proceedings of the International Conference on Strongly Correlated Electrons with Orbital Degrees of Freedom (ORBITAL2001)
journal article
日本物理学会
2002-12
application/pdf
Journal of the Physical Society of Japan
Supplement
71
353
355
Journal of the Physical Society of Japan
AA00704814
00319015
https://niigata-u.repo.nii.ac.jp/record/2133/files/1021.pdf
eng
info:doi/10.1143/JPSJS.71S.353
http://journals.jps.jp/doi/abs/10.1143/JPSJS.71S.353
Copyright (C) 2002 The Physical Society of Japan