NON-FERMI LIQUID BEHAVIOR OF A ONE-DIMENSIONAL HUBBARD-MODEL

被引：1
|
作者：
KANG, K
MIN, BI
机构：
[1] Department of Physics, Pohang University of Science and Technology, Pohang
来源：
SOLID STATE COMMUNICATIONS | 1994年 / 91卷 / 05期
关键词：
D O I：
10.1016/0038-1098(94)90642-4
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The single particle self,-energy and the renormalization coefficient for the one dimensional (1D) Hubbard model are investigated within the 2nd order perturbational treatment in U, the on-site Coulomb repulsion. Assuming a linear dispersion for the bare electronic spectra, we have obtained analytically the imaginary part of the self-energy, Im SIGMA, near the Fermi energy (epsilon(F)) and the renormalization coefficient at epsilon(F), Z(F). We have found that Im SIGMA(omega)alpha\omega - sigma(F)\ near omega = epsilon(F) and Z(F) = 0, which implies that the 1D Hubbard model system exhibits a non-Fermi liquid behavior within the 2nd order perturbational treatment.
引用
收藏
页码：403 / 406
页数：4
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