Quantum nonlinear sigma model with a damping term; Finite temperature renormalization group analysis

被引：0
|
作者：
Crisan, M [1 ]
Grosu, I [1 ]
机构：
[1] Univ Cluj, Dept Theoret Phys, Cluj Napoca 400084, Romania
来源：
JOURNAL OF SUPERCONDUCTIVITY | 2005年 / 18卷 / 04期
关键词：
non-linear quantum sigma model; quantum criticality; pseudogap in HTCS;
D O I：
10.1007/s10948-005-0041-y
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the behavior of the finite temperature quantum nonlinear sigma model in two dimensions in the presence of the damping of the form f (vertical bar omega(n)vertical bar) = gamma vertical bar omega n vertical bar(alpha), where ce satisfies alpha >= 1. The analytical calculations will be performed using alpha = 2 and the results will be compared with the standard results obtained for the standard quantum nonlinear sigma model. The behavior of such a system is connected with the pseudogap which appears in the normal state of the cuprate superconductors.
引用
收藏
页码：561 / 565
页数：5
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