Theory of the upper critical field in anisotropic superconductors
Journal Article
·
· Phys. Rev., B: Condens. Matter; (United States)
The upper critical field in superconductors is calculated using a model which incorporates anisotropy in both the Fermi surface and the superconducting pair state. The effects of nonlocality are included to all orders in perturbation theory, giving results valid over nearly the entire temperature range. It is shown that increasing Fermi-surface anisotropy causes H/sub c/2 to become more nearly linear in temperature, whereas even small amounts of pair-state anisotropy cause positive curvature in H/sub c/2(T) near T/sub c/0. All effects of anisotropy are diminished by increasing the impurity scattering rate. The theory is fit to experimental data on NbSe/sub 2/.
- Research Organization:
- Ames Laboratory, U.S. Department of Energy and Department of Physics, Iowa State University, Ames, Iowa 50011
- OSTI ID:
- 5372512
- Journal Information:
- Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 21:9; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
CHALCOGENIDES
COOPER PAIRS
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY LEVELS
FERMI LEVEL
MAGNETIC FIELDS
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
PHYSICAL PROPERTIES
SELENIDES
SELENIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
360603* -- Materials-- Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
CHALCOGENIDES
COOPER PAIRS
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY LEVELS
FERMI LEVEL
MAGNETIC FIELDS
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
PHYSICAL PROPERTIES
SELENIDES
SELENIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS