Exact calculations of Tc from Eliashberg equation for simultaneous action of different channels of pairing
| Autor: | M.B. Mineev-Weinstein |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Superconductivity
Physics Coupling constant Energy Engineering and Power Technology Condensed Matter Physics Symmetry (physics) Action (physics) Cutoff frequency Electronic Optical and Magnetic Materials Pairing Quantum mechanics Electrical and Electronic Engineering Eigenvalues and eigenvectors Dimensionless quantity |
| Zdroj: | Physica C: Superconductivity. 182:322-326 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(91)90529-8 |
| Popis: | The critical temperature of superconductors is calculated for an arbitrary number of independent electron-electron interaction channels. Each channel is described by an appropriate dimensionless coupling constant, λ i , and a cutoff frequency, Ω i . The calculation is done using the Eliashberg equation in the weak limit (i.e. when the normalization constant Z ω ⋍1). Using the symmetry of the determinant, the exact value of its lowest eigenvalue, i.e. critical temperature, is found in the form of a continuous fraction. This result is in agreement with the well-known case for two channels. Its application to high- T c superconductors is discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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