Ultrafast Melting of Superconductivity in an Iron-Based Superconductor
D. Nevola, N. Zaki, J. M. Tranquada, W.-G. Yin, G. D. Gu, Q. Li, P. D. Johnson
DOI 10.1103/PhysRevX.13.011001 · Physical Review X
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Abstract
Intense debate has recently arisen regarding the photoinduced changes to the iron-chalcogenide superconductors, including the enhancement of superconductivity and a metastable state. Here, by employing high-energy resolution, we directly observe the melting of superconductivity on ultrafast timescales. We demonstrate a distinctly nonequilibrium response on short timescales, where the gap fills in prior to the destruction of the superconducting peak, followed by a metastable response. We propose that the former is due to pair phase decoherence and speculate that the latter is due to the increase in double-stripe correlations that are known to compete with superconductivity. Our results add to exciting new developments on the iron-based superconductors, indicating that the photoinduced metastable state possibly competes with superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSe0.45Te0.55 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.5 | Pressure not reported | unknown |
| FeSe0.45Te0.55 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.5 | Pressure not reported | onset |
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