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SUMMARY:2023 Spring Graduate Physics Colloquium Series: Duncan Miertschin
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:<b><center>2023 Spring Graduate Physics Colloquium Series<p>Duncan Miertschin<p> Ultrafast Melting of Superconductivity in an Iron=based Supercondutor</b></center><p>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.<p>
<center><b>Zoom: Meeting ID: 864 8897 6287<p>
Passcode: 176182<p>
For more information, please contact: Dr. Anzhong Wang 254-710-2276


LOCATION:Baylor Sciences Building, Room E.231
DTSTART;TZID=US_Central:20230210T153500
DTEND;TZID=US_Central:20230210T170000
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