Temperature effect on the quasiparticle spectrum of an impurity-doped superconductor with two separate electron groups
M. Belogolovskii, A. Plecenik, M. Grajcar
DOI 10.1103/PhysRevB.72.052508 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The two-gap BCS theory with incoherent single-particle scattering is applied to study the temperature dependence of the quasiparticle density of states in a superconductor with two separate electron groups. It is shown that in such a material nonmagnetic impurities can affect superconductivity in a nontrivial way. For considerable intergroup scattering rates comparable with clean-limit gap magnitudes we find a crossover from two-feature densities of states at low temperatures to standard BCS-type curves with a single maximum, as T increases. We point out that some unexpected temperature-dependent features observed for magnesium diboride, a two-band superconductor, may not represent its intrinsic characteristics.
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. | 39 | Pressure not reported | unknown |
Similar papers
Electronic and dynamical properties of the MgB2 surface: Implications for the superconducting properties
similarity 0.96G. Profeta et al.
Source status unknown — claims are unverified
High magnetic field superconductivity in a two-band superconductor
similarity 0.96Tancredi Salamone et al.
Source status unknown — claims are unverified
Superconducting critical temperature and the isotope exponent versus total electron concentration for two-band superconductors: Effect of the band structure
similarity 0.96J. J. Rodríguez-Núñez & A. A. Schmidt
Source status unknown — claims are unverified
High-temperature superconductivity in electrides dominated by hybridized p-orbital-like electride states
similarity 0.96Zhao Liu et al.
Source status unknown — claims are unverified
Properties of the superconducting state in a two-band model
similarity 0.96E. J. Nicol & J. P. Carbotte
Source status unknown — claims are unverified
Superconductivity and topological properties of MgB2-type diborides from first principles
similarity 0.96Yipeng An et al.
Source status unknown — claims are unverified