2023 Spring Graduate Physics Colloquium Series: Duncan Miertschin

Friday, February 10, 2023
3:35 pm - 5:00 pm
Baylor Sciences Building, Room E.231
2023 Spring Graduate Physics Colloquium Series

Duncan Miertschin

Ultrafast Melting of Superconductivity in an Iron=based Supercondutor

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.

Zoom: Meeting ID: 864 8897 6287

Passcode: 176182

For more information, please contact: Dr. Anzhong Wang 254-710-2276