Electronic specific heat of two-band layered superconductors: Analysis within the generalized two-band α model
E. G. Maksimov, A. E. Karakozov, B. P. Gorshunov, E. S. Zhukova, Ya. G. Ponomarev, M. Dressel
DOI 10.1103/PhysRevB.84.174504 · Physical Review B
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Abstract
The generalized two-band α model of superconductivity is consistently developed by taking into account the interband electron-phonon interaction. The model is applied to calculate the electronic contribution to the specific heat, superconducting gaps, and electron-phonon coupling constants of the multiband layered superconductors MgB2 and Ba(Fe0.925Co0.075)2As2. For both compounds, the energy gaps and electron-phonon coupling constants are determined, and the temperature behavior of the specific heat is obtained that describes the experimental data well. It is shown that the well-known two-band α model that assumes independent bands is formally valid only in the case of relatively strong interband scattering in the band with a smaller gap.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe0.925Co0.075)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Mg1-xAlxB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe0.9Co0.1)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Mg11B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe0.95Co0.075)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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