Demons and superconductivity
Model calculations are used to explore the role of demons (acoustic plasmons involving light and heavy mass carriers) in superconductivity. Heavy d electrons and light s and p electrons in a transition metal are used for discussion, but the calculation presented is more general, and the results can be applied to other systems. The analysis is based on the dielectric-function approach and the Bardeen-Cooper-Schrieffer theory. The dielectric function includes intraband and interband s-d scattering, and a tight-binding model is used to examine the role of s-d hybridization. The demon contribution generally reduces the Coulomb interaction between the electrons. Under suitable conditions, the model calculations indicate that the electron-electron interaction via demons can be attractive, but the results also suggest that this mechanism is probably not dominant in transition metals and transition-metal compounds. An attractive interband contribution is found, and it is proposed that this effect may lead to pairing in suitable systems.
- Research Organization:
- Department of Physics, University of California, and Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720
- OSTI ID:
- 6531714
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Vol. 23:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTORS
PLASMONS
TRANSITION ELEMENTS
SUPERCONDUCTIVITY
BAND THEORY
BCS THEORY
DIELECTRIC PROPERTIES
MATHEMATICAL MODELS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
METALS
PHYSICAL PROPERTIES
QUASI PARTICLES
656101* - Solid State Physics- Superconductivity- General Theory- (-1987)