Superfluid density of a photo-induced superconducting state

A. Shtyk; G. Goldstein; C. Aron; C. Chamon

doi:10.1103/PhysRevB.102.224507

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Superfluid density of a photo-induced superconducting state

A. Shtyk, G. Goldstein, C. Aron, C. Chamon

DOI 10.1103/PhysRevB.102.224507 · Physical Review B

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Abstract

Nonequilibrium conditions offer novel routes to superconductivity that are not available at equilibrium. For example, by engineering nonequilibrium electronic populations, pairing may develop between electrons in different energy bands. A concrete proposal has been made to photo-induce superconductivity in a semiconductor, where pairing occurs between electrons in the conduction and valence bands, even for repulsive interactions. Here, we calculate the superfluid density for such a nonequilibrium paired state, and find it to be positive for repulsive interactions and interband pairing. The positivity of the superfluid density implies the stability of the photo-induced superconducting state as well as the existence of the Meissner effect.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu2O6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown