Correlation functions and coherence lengths in a two-gap superconductor
Artjom Vargunin, Teet Örd
DOI 10.1103/PhysRevB.86.104506 · Physical Review B
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Abstract
We derive analytically the spatial correlation functions for gap fluctuations in a two-band scenario with intraband and interband pair-transfer interactions. These functions demonstrate the changes in functionality due to the presence of two channels of coherency described by the divergent and finite correlation lengths. Even at the phase transition point, both channels are essential for two-band superconductivity. Generally, their relative contributions depend on the temperature and system parameters.
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 |
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