Coupled states in electron-phonon systems, superconductivity and high-{Tc} superconductivity of crystals

Journal Article · Mon Sep 30 00:00:00 EDT 1996 · International Journal of Modern Physics B

DOI:https://doi.org/10.1142/S0217979296001173· OSTI ID:398292

Yaremko, A M; Mozdor, E V ^[1]; Kruchinin, S P ^[2]

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1. Inst. of Physics of Semiconductors, Kiev (Ukraine)
2. Bogolyubov Inst. for Theoretical Physics, Kiev (Ukraine)

The new theoretical approach is proposed for studying the coupled states responsible for superconductivity in crystal without using the idea of electron pairing. From the approach it follows that BCS electron-pairing postulates are only approximate. It is shown that superconductivity (SC) coupled states can be created by pairs of electrons with nonzero full momentum and spin (k{sub 1} + k{sub 2} {ne} 0, s + s{prime} {ne} 0). The model numerical calculations have shown that dependence of SC gap (energy of coupled states) on temperature is nonexponential and depends on the momenta of electrons in pair.

• Sponsoring Organization: USDOE
• OSTI ID: 398292
• Journal Information: International Journal of Modern Physics B, Vol. 10, Issue 21; Other Information: PBD: 30 Sep 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
HIGH-TC SUPERCONDUCTORS
MATHEMATICAL MODELS
ELECTRON-PHONON COUPLING
SUPERCONDUCTIVITY
CRYSTALS
BCS THEORY
ELECTRON PAIRS