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SUMMARY:IMX Talks - Interlayer coherence at room temperature in high Tc cu
 prates and photo-induced superconductivity
DTSTART:20251001T101500
DTEND:20251001T111500
DTSTAMP:20260412T075828Z
UID:057e4f3cecaed85ca85b4a892a85a551a2e328d6b5cf188a46fc9e30
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Marios H. Michael\, Max Planck Institute for the Physics o
 f Complex Systems\nIn the past decade\, photo-induced superconducting-like
  behaviors have been reported in a number of materials driven by intense p
 ump fields. Of particular interest is the high-Tc cuprate YBa2Cu2O{6+x}(YB
 CO)\, where such effect has been reported up to the so-called pseudogap te
 mperature T* ~ 300-400 K. In a recent tour-de-force experiment\, a transie
 nt magnetic field which is proportional to and in the same direction of an
  applied field has been observed outside the sample\, suggestive of flux e
 xclusion due to the Meissner effect. In this talk\, I will present a micro
 scopic theoretical model with local superconducting correlations above Tc\
 , that can capture qualitatively and quantitatively the experimental resul
 ts. Specifically\, I will show how driving can trigger an instability of l
 ocal interlayer coherence leading to exponentially enhanced currents that 
 we argue are responsible for the magnetic field observed experimentally ou
 tside the sample. Through this lens I will explain how these experiments c
 an be viewed as evidence for interlayer coherence at room temperature in Y
 BCO and why theoretically this idea could be quite realistic. \nFinally\,
  I will make a few comments on how this instability of interlayer coherenc
 e can be straightforwardly applied to excitonic bilayer systems. 
LOCATION:BM 5202 https://plan.epfl.ch/?room==BM%205202
STATUS:CONFIRMED
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