Critical curve in an antiferromagnetic superconductor with nonmagnetic impurities

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00710355· OSTI ID:5974728

Chi, H; Nagi, A D.S.

The critical factor curve of a transition of the second kind in an antiferromagnetic superconductor (AFS) with nonmagnetic impurities has been studied. The AFS is described by using the mean-field model given by Nass, Levin, and Grest and assuming a one-dimensional electron band. They find that the points on the critical curve satisfy the thermodynamic stability condition for 0 less than or equal to ..cap alpha../sub 1 tau//..delta../sub 0/ less than or equal to 5.04 and 0.49 less than or equal to H/sub Q tau//..delta../sub 0/ less than or equal to 1.64. Here ..cap alpha../sub 1/ is the inverse lifetime of a conduction electron for nonmagnetic impurity scattering, H/sub Q/ is the antiferromagnetic molecular field, ..delta../sub 0/ is the zero-temperature order parameter of a superconductor in the absence of H/sub Q/ and impurities. Further, ..cap alpha../sub 1 tau/ and H/sub Q tau/ denote the values of these quantities for points on the critical curve. For ..cap alpha../sub 1 tau//..delta../sub 0/ > 5.04 and H/sub Q tau//..delta../sub 0/ > 1.64, the phase transition from the superconducting to the normal state is always of the second kind. Some thermal properties of the system near the critical curve have also been investigated and they find that these depends dramatically on the impurity concentration.

• Research Organization: Univ. of Waterloo, Ontario
• OSTI ID: 5974728
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 67:5-6; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

656001* -- Condensed Matter Physics-- Solid-State Plasma
657002 -- Theoretical & Mathematical Physics-- Classical & Quantum Mechanics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
ANGULAR MOMENTUM OPERATORS
ANTIFERROMAGNETIC MATERIALS
BCS THEORY
COHERENCE LENGTH
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-HOLE COUPLING
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
FERMI LEVEL
FERMIONS
FREE ENERGY
FUNCTIONS
GREEN FUNCTION
HAMILTONIANS
IMPURITIES
LENGTH
LEPTONS
LIFETIME
MAGNETIC MATERIALS
MATERIALS
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MEAN-FIELD THEORY
ORDER PARAMETERS
ORDER-DISORDER TRANSFORMATIONS
PARTICLE PROPERTIES
PAULI SPIN OPERATORS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUANTITY RATIO
QUANTUM OPERATORS
RARE EARTH COMPOUNDS
SCATTERING
SPECIFIC HEAT
SPIN
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION TEMPERATURE