Random-field-like disorder and magnetic-field effects in unconventional superconductors

Luigi De Cesare

doi:10.1103/PhysRevB.43.10555

← Back to search

Random-field-like disorder and magnetic-field effects in unconventional superconductors

Luigi De Cesare

DOI 10.1103/PhysRevB.43.10555 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

The effects of short-range correlated random-field-like disorder and magnetic-field fluctuations in a generalized d-dimensional Ginzburg-Landau model of unconventional superconductors are investigated by means of the renormalization-group approach to first order in ε=6-d. It is found that the quenched disorder, in competition with the combined action of crystal anisotropies and magnetic fluctuations, does not create stable fixed points for d<6, indicating an absence of the usual second-order phase transitions. The unstable physical fixed points may govern fluctuation-induced first-order transitions, but superconducting glass states associated with the symmetry-breaking disorder cannot be excluded a priori.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UBe13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
(U1-xThx)Be13 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown