Critical and non-critical coherence lengths in a two-band superconductor
arXiv:1201.5748 · doi:10.1007/s10948-012-1656-4
Abstract
We study the peculiarities of coherency in a two-gap superconductor. The both intraband couplings, inducing superconductivity in the independent bands, and interband pair-transfer interaction have been taken into account. On the basis of the Ginzburg-Landau equations derived from the Bogoliubov-de Gennes equations and the relevant self-consistency conditions for a two-gap system, we find critical and non-critical coherence lengths in the spatial behaviour of the fluctuations of order parameters. The character of the temperature dependencies of these length scales is determined by the relative contributions from intra- and interband interaction channels.
Accepted for publication in Journal of Superconductivity and Novel Magnetism
References in corpus (4)
- Ginzburg-Landau theory of vortices in a multi-gap superconductor
- Evolution and Control of Oxygen Order in a Cuprate Superconductor
- Microscopic derivation of two-component Ginzburg-Landau model and conditions of its applicability in two-band systems
- Feshbach resonances and mesoscopic phase separation near a quantum critical point in multiband FeAs-based superconductors
Cited by in corpus (11)
- Two-band superconductors: Extended Ginzburg-Landau formalism by a systematic expansion in small deviation from the critical temperature
- Effective Ginzburg-Landau free energy functional for multi-band isotropic superconductors
- Type-1.5 superconductivity in muliband and other multicomponent systems
- Tunable BCS-BEC crossover, reentrant, and hidden quantum phase transitions in two-band superconductors with tunable valence and conduction bands
- Band filling effects on coherence lengths and penetration depth in the two-orbital negative-U Hubbard model of superconductivity
- Correlations of superconducting fluctuations in a two-gap system
- Two-gap superconductivity: interband interaction in the role of external field
- Collective excitations in two-band superconductors
- Shrinking of fluctuation region in a two-band superconductor
- Predictive power of the Berezinskii-Kosterlitz-Thouless theory based on Renormalization Group throughout the BCS-BEC crossover in 2D superconductors
- Unusual boundary effect on coherency of two-band superconductivity