Phase diagram of superconductors
Mar, 1995
45 pages
Published in:
- Phys.Rev.B 53 (1996) 5734-5757
e-Print:
- hep-ph/9503334 [hep-ph]
Report number:
- HD-THEP-95-05
Citations per year
Abstract:
The universal behaviour of superconductors near the phase transition is described by the three-dimensional field theory of scalar quantum electrodynamics. We approximately solve the model with the help of non-perturbative flow equations. A first- or second-order phase transition is found depending on the relative strength of the scalar coupling versus the gauge coupling. The region of a second-order phase order transition is governed by a fixed point of the flow equations with associated critical exponents. We also give an approximate description of the tricritical behaviour and briefly discuss the crossover relevant for the onset of scaling near the critical temperature. Final confirmation of a second-order transition for strong type-II superconductors requires further analysis with extended truncations of the flow equations.- superconductivity: model
- model: superconductivity
- critical phenomena
- Higgs model: abelian
- effective action
- coupling: gauge
- gauge: coupling
- field equations: fixed point
- scaling
- quantum electrodynamics: scalar
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