Superconductivity in the Kondo lattice

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.29.2497· OSTI ID:7064312

Tachiki, M; Maekawa, S

Superconductivity in the Kondo lattice was theoretically studied in connection with superconductivity in CeCu/sub 2/Si/sub 2/ and UBe/sub 13/. To achieve superconductivity in these systems, coherence between Ce ions or U ions is of crucial importance. To take account of the coherence, the periodic Anderson model with a small dispersion of the f band was used. With the use of a single-site approximation for the self-energy of the f electron, the heavy fermion state near the Fermi level was derived. This state is a highly correlated state, and the Coulomb repulsive interaction is strongly reduced. The f electrons are found to be responsible for superconductivity. Both the specific heat in the normal state C/sub N/(T) and the specific-heat jump ..delta..C at T/sub c/ are very large, and the ratio ..delta..C/C/sub N/(T/sub c/) has the BCS value in the weak-coupling approximation. The thermodynamic critical field is very high.

• Research Organization: The Research Institute for Iron, Steel and Other Metals, Tohoku University, Katahira, Sendai 980, Japan and Materials Science and Technology Division, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 7064312
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 29:5; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BAND THEORY
BCS THEORY
BERYLLIUM COMPOUNDS
CERIUM COMPOUNDS
CERIUM SILICIDES
COPPER COMPOUNDS
COPPER SILICIDES
CORRELATIONS
COULOMB FIELD
CRITICAL FIELD
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
ELECTRON CORRELATION
ELECTRONIC STRUCTURE
ENERGY LEVELS
FERMI LEVEL
INFORMATION
KONDO EFFECT
MAGNETIC FIELDS
NUMERICAL DATA
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SILICIDES
SILICON COMPOUNDS
SPECIFIC HEAT
SUPERCONDUCTIVITY
THEORETICAL DATA
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
URANIUM COMPOUNDS