Nesting Induced Precursor Effects: a Renormalization Group Approach

Details Nesting Induced Precursor Effects: a Renormalization Group Approach Nesting Induced Precursor Effects: a Renormalization Group Approach

2000-07-28

arxiv.org/abs/cond-mat/0007463v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, 1 table

Scientific paper

10.1103/PhysRevLett.86.2866

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.

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