Detecting superconductivity out of equilibrium

S. Paeckel; B. Fauseweh; A. Osterkorn; T. Köhler; D. Manske; S. R. Manmana

doi:10.1103/PhysRevB.101.180507

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Detecting superconductivity out of equilibrium

S. Paeckel, B. Fauseweh, A. Osterkorn, T. Köhler, D. Manske, S. R. Manmana

DOI 10.1103/PhysRevB.101.180507 · Physical Review B

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Abstract

Recent pump-probe experiments on underdoped cuprates and similar systems suggest the existence of a transient superconducting state above Tc. This poses the question of how to reliably identify the emergence of long-range order, in particular superconductivity, out of equilibrium. We investigate this point by studying a quantum quench in an extended Hubbard model and by computing various observables, which are used to identify (quasi-)long-range order in equilibrium. Our findings imply that, in contrast to current experimental studies, it does not suffice to study the time evolution of the optical conductivity to identify superconductivity. In turn, we suggest to utilize time-resolved angle-resolved photoemission spectroscopy experiments to probe for the formation of a condensate in the two-particle channel.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
K3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown