Ginzburg-Landau theory of two-band superconductors: Absence of type-1.5 superconductivity
V. G. Kogan, J. Schmalian
DOI 10.1103/PhysRevB.83.054515 · Physical Review B
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Abstract
It is shown that within the Ginzburg-Landau (GL) approximation the order parameters Δ1(r,T) and Δ2(r,T) in two-band superconductors vary on the same length scale, the difference in zero-T coherence lengths ξ0ν~ℏvFν/Δν(0), ν=1,2 notwithstanding. This amounts to a single physical GL parameter κ and the classic GL dichotomy: κ<1/2 for type I and κ>1/2 for type II.
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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