Nesting Induced Precursor Effects: a Renormalization Group Approach
强关联电子
2009-10-31 v1 超导电性
摘要
We develop a controlled weak coupling renormalization group (RG) approach to itinerant electrons. Within this formalism we rederive the phase diagram for two-dimensional (2D) non-nested systems. Then we study how nesting modifies this phase diagram. We show that competition between p-p and p-h channels, leads to the manifestation of unstable precursor fixed points in the RG flow. This effect should be experimentally measurable, and may be relevant for an explanation of pseudogaps in the high temperature superconductors (HTC), as a crossover phenomenon.
引用
@article{arxiv.cond-mat/0007463,
title = {Nesting Induced Precursor Effects: a Renormalization Group Approach},
author = {F. Vistulo de Abreu and B. Doucot},
journal= {arXiv preprint arXiv:cond-mat/0007463},
year = {2009}
}
备注
4 pages, 4 figures, 1 table