Transition temperature of strong-coupling superconductors

Journal Article · Wed Sep 01 04:00:00 EDT 1982 · Sov. Phys. - Usp. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1070/PU1982v025n09ABEH004602· OSTI ID:6015660

Dolgov, O V; Maksimov, E G

The possible existence of superconductors with high transition temperatures is analyzed for both the ordinary electron-phonon interaction and nonphonon superconductivity mechanisms. The existence of such systems depends on a negative static dielectric permittivity. The possible occurrence of this situation for an electron-ion system is analyzed. It is shown that negative values of the static dielectric permittivity are possible in the case of strong local-field effects, i. e., in the case of exchange-correlation interactions in the electron subsystem or the localization of point ions for an electron-phonon system. Equations for the transition temperature of strong-coupling superconductors are analyzed. Restrictions imposed on the transition temperature by the equations themselves and by the conditions for stability of the material are examined.

• Research Organization: P. N. Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, USSR
• OSTI ID: 6015660
• Journal Information: Sov. Phys. - Usp. (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Usp. (Engl. Transl.); (United States) Vol. 25:9; ISSN SOPUA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON-PHONON COUPLING
MATHEMATICAL MODELS
PARTICLE MODELS
PERMITTIVITY
PHYSICAL PROPERTIES
STRONG-COUPLING MODEL
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE