Effect of Anderson magnetic impurities on superconductivity

Journal Article · Wed Feb 01 04:00:00 EST 1978 · Phys. Rev., B; (United States)

DOI:https://doi.org/10.1103/PhysRevB.17.1195· OSTI ID:5063804

Sakurai, A

For the purpose of clarifying the Kondon effect in superconductors, in particular, at lower temperatures than a characteristic temperature T/sub K/, a perturbation calculation is performed within the Anderson model. In a microscopic Fermi-liquid theory which accurately describes the low-energy excitations, we consider the transition temperature T/sub c/ and the jump in the specific heat ..delta..C of the alloys. The energy dependence of the magnetic scattering generally leads to a finite tail in the concentration dependence of T/sub c/, which suggests the existence of the third transition back to a superconducting stat ae at low temperature in superconducting alloys showing a ''reentrance'' phenomenon. Alloys with high Kondo temperatures are found to be well described by a nonmagnetic Hartree-Fock solution with renormalized parameters. In addition, expansion formulas for the four-vertex parts of the electron scattering are derived near the Fermi surface.

• Research Organization: Institut fuer Theoretische Physik, Freie Universitaet Berlin, 1000 Berlin 33, Arnimallee 3, Germany
• OSTI ID: 5063804
• Journal Information: Phys. Rev., B; (United States), Journal Name: Phys. Rev., B; (United States) Vol. 17:3; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

656102* -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENERGY LEVELS
FERMI LEVEL
HARTREE-FOCK METHOD
IMPURITIES
KONDO EFFECT
PHYSICAL PROPERTIES
SPECIFIC HEAT
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE