OPTICAL CONDUCTIVITY OF THE HUBBARD-MODEL IN THE STRONG-COUPLING REGIME

被引：1
|
作者：
FABIAN, J [1 ]
机构：
[1] COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,DEPT THEORET PHYS,CS-84215 BRATISLAVA,SLOVAKIA
来源：
PHYSICS LETTERS A | 1994年 / 186卷 / 03期
关键词：
D O I：
10.1016/0375-9601(94)90352-2
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
On the basis of a diagrammatic technique for Hubbard operators we calculate the real part of the frequency-dependent conductivity in the Hubbard model on any-dimensional cubic lattice at finite temperatures. Results in the lowest non-vanishing order of the perturbation theory are presented for various values of the parameters U, t and band fillings. We explicitly check the sum rule within the perturbation order. The 1/T behavior of the Drude weight is observed for temperatures t much less than k T much less than U.
引用
收藏
页码：269 / 273
页数：5
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