Transition temperature of a superconductor containing mixed-valence impurities

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.27.558· OSTI ID:6400628

Schlottmann, P

The reduction of the superconductor transition temperature of an alloy containing mixed-valence impurities has been calculated. We considered the U..-->..infinity limit of the Anderson model by keeping only the ground multiplets of the two active ionic configurations, 4f/sup eta/ and 4f/sup eta+1/. If one of the multiplets is a singlet, T/sub c/ is reduced by pair weakening and decreases exponentially with the impurity concentration. On the other hand, if both multiplets are magnetic, the T/sub c/ dependence on c is similar to that of the Abrikosov-Gorkov theory. The superconductivity quenching mechanism in this case is Cooper-pair breaking.

• Research Organization: Institut fuer Theoretische Physik, Freie Universitaet Berlin, Arnimallee 3, D-1000 Berlin 33, Germany
• OSTI ID: 6400628
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Journal Issue: 1 Vol. 27:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABRIKOSOV THEORY
ALLOYS
ANGULAR MOMENTUM
CHARGE STATE
COOPER PAIRS
EXCHANGE INTERACTIONS
FLUCTUATIONS
GORKOV-ELIASHBERG THEORY
IMPURITIES
INTERACTIONS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SPIN
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VALENCE
VARIATIONS