Quenched-impurity and magnetic-field effects on the phase transition in unconventional superconductors

The combined influence of crystal anisotropy, magnetic fluctuations, and quenched randomness upon the critical behavior of unconventional superconductors is studied by means of the renormalization-group analysis within the {epsilon} expansion. The fixed points of the renormalization-group equations...

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Bibliographic Details
Published in:Physical review. B, Condensed matter Condensed matter, 1991, Vol.43 (1B), p.1150-1153
Main Authors: BUSIELLO, G, DE CESARE, L, MILLEV, Y. T, RABUFFO, I, UZUNOV, D. I
Format: Article
Language:English
Subjects:
656100 - Condensed Matter Physics- Superconductivity
ANISOTROPY
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
CRYSTAL FIELD
Exact sciences and technology
FLUCTUATIONS
GINZBURG-LANDAU THEORY
IMPURITIES
MAGNETIC FIELDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
Physics
Properties of type I and type II superconductors
Superconductivity
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
VARIATIONS
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Summary:The combined influence of crystal anisotropy, magnetic fluctuations, and quenched randomness upon the critical behavior of unconventional superconductors is studied by means of the renormalization-group analysis within the {epsilon} expansion. The fixed points of the renormalization-group equations are presented and their properties investigated to first order in {epsilon}=4{minus}{ital d}. Because of the crystal-field anisotropy, no stable fixed points exist and the main conclusion is that only fluctuation-driven first-order transitions should occur in unconventional superconductors in the vicinity of the critical point.
ISSN:0163-1829
1095-3795
DOI:10.1103/PhysRevB.43.1150