Zeeman splitting in multiple-band superconductors

R. G. Dias

doi:10.1103/PhysRevB.72.012505

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Zeeman splitting in multiple-band superconductors

R. G. Dias

DOI 10.1103/PhysRevB.72.012505 · Physical Review B

T1

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Abstract

We present a study of Zeeman splitting effects in the phase diagram of multiple-band superconductors. In the particular case of a two-band superconductor, several free energy local minima are present at low temperature leading to an enriched phase diagram. In particular, at low temperature and for small interband coupling, a first-order phase transition occurs between two superconducting phases. As the interband coupling grows, this transition approaches the first order transition to the normal phase and then disappears, leaving behind a region of enhanced fluctuations. A cascade of first-order transitions is expected in the N-band case.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown