Functional renormalization group for d-wave superconductivity in Hubbard type models

The temperature dependence of d-wave superconducting order for two dimensional fermions with d-wave attraction is investigated by means of the functional renormalization group with partial bosonization. Below the critical temperature T_c we find superconductivity, a gap in the electron propagator an...

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Bibliographic Details
Published in:arXiv.org 2008-01
Main Authors: Krahl, H C, C Wetterich
Format: Article
Language:English
Subjects:
Fermions
Fluids
Phase transitions
Superconductivity
Superfluidity
Temperature dependence
Two dimensional models
Online Access:Get full text
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Summary:The temperature dependence of d-wave superconducting order for two dimensional fermions with d-wave attraction is investigated by means of the functional renormalization group with partial bosonization. Below the critical temperature T_c we find superconductivity, a gap in the electron propagator and a temperature dependent anomalous dimension. At T_c the renormalized "superfluid density" jumps and the approach to T_c from above is characterized by essential scaling. These features are characteristic for a phase transition of the Kosterlitz-Thouless (KT) type.
ISSN:2331-8422
DOI:10.48550/arxiv.0608667