Superconducting classes of heavy-fermion materials

Journal Article · Wed Mar 01 00:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.4145· OSTI ID:6362303

Ozaki, M; Machida, K

Stimulated by recent remarkable findings which lead to a common feature of all four known heavy-fermion superconductors UPt/sub 3/, (U,Th)Be/sub 13/, URu/sub 2/Si/sub 2/, and CeCu/sub 2/Si/sub 2/, namely, a close proximity between the magnetism and unconventional superconducting pairing state we present a general framework on how to identify the superconducting classes. Taking into account the existence of the spin-density wave (SDW) above T/sub c/ in UPt/sub 3/ and URu/sub 2/Si/sub 2/ and below T/sub c/ in (U,Th)Be/sub 13/ and CeCu/sub 2/Si/sub 2/, we enumerate group theoretically the pairing states compatible with given space-group symmetry according to the Landau subordination scheme for the second-order phase transition. This enables us to effectively narrow down the possible states. These enumerated states are quite general, independent of particular models or pairing interaction forms. Then we give some physical arguments on the relative stability among the allowed states. Maximally utilizing experimental and theoretical data available at present, we attempt to decrease the number of the possible states and obtain the most plausible candidates for each material. To confirm the emerging universal feature that the ground state in heavy-fermion superconductors is the coexisting phase with the magnetism, further experiments are proposed, based on our results.

• Research Organization: Department of Physics, Kyoto University, Kyoto, 606 Japan
• OSTI ID: 6362303
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 39:7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BERYLLIUM ALLOYS
SUPERCONDUCTIVITY
CERIUM ALLOYS
COPPER ALLOYS
RUTHENIUM ALLOYS
SILICON ALLOYS
THORIUM ALLOYS
URANIUM ALLOYS
CLASSIFICATION
ENERGY LEVELS
PAIRING INTERACTIONS
FERMIONS
GROUP THEORY
INTERMETALLIC COMPOUNDS
MAGNETIC PROPERTIES
PAIRING ENERGY
PLATINUM ALLOYS
WAVE PROPAGATION
ACTINIDE ALLOYS
ALLOYS
BINDING ENERGY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
INTERACTIONS
MATHEMATICS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
RARE EARTH ALLOYS
360104* - Metals & Alloys- Physical Properties
656100 - Condensed Matter Physics- Superconductivity