We study the effects of a particular momentum dependence of the Coulomb repulsion, along with the standard electron-phonon interaction, on r, within Eliashberg theory. The particular momentum dependence arises from the recently proposed "hole mechanism" of superconductivity. In that mechanism high T
Rigorous results in the theory of superconductivity with Coulomb-like repulsion
β Scribed by A.P. Bakulev; N.N. Bogoljubov Jr.; A.M. Kurbatov
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 826 KB
- Volume
- 134
- Category
- Article
- ISSN
- 0378-4371
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β¦ Synopsis
The traditional method of the approximating hamiltonian is applied for the investigation of a model of a superconductor with interaction of the BCS type and Coulomb-like repulsion, the latter being described by unbounded operators. It is shown that the traditional method can be generalized in such a way that for the model under consideration one can prove the asymptotic (in the thermodynamic limit V+ m) coincidence not only of the free energies (per unit volume) but also of the correlation functions of the model and approximating hamiltonians.
π SIMILAR VOLUMES
The free energy of the Fermi-gas with repulsive interaction is calculated below the critical temperature T c, which corresponds to the first instability of the normal state. It is shown that in both cases T--~ Tc and T = 0 this instability really leads to lowering of the free energy, i.e. the triple