Theory of the upper critical field of a magnetic superconductor

M. Schossmann; J. P. Carbotte

doi:10.1103/PhysRevB.34.1550

← Back to search

Theory of the upper critical field of a magnetic superconductor

M. Schossmann, J. P. Carbotte

DOI 10.1103/PhysRevB.34.1550 · 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

We have derived a general set of microscopic equations for the upper critical field of a magnetic superconductor which is valid for any concentration of normal impurity scattering and includes fully the dynamics of the phonons and of the spin fluctuations. As spin correlations can be long range, we avoid, in our derivation, the usual contact approximation and get an expression which behaves properly near the magnetic transition. Numerical estimates for various possible values of the magnetic parameters reveal that, for some regimes, the dynamics of the spin diffusions can be important. In addition it is found, from general symmetry considerations, that singlet-triplet amplitude mixing can occur in dirty superconductors with large band-splitting effects due to internal magnetization.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
ErRh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
HoMo6S6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown