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SUMMARY:Non-retarded pairing interaction in a high-Tc cuprate from coheren
 t charge fluctuation spectroscopy 
DTSTART:20120706T140000
DTSTAMP:20261001T181433Z
UID:ead9f84d310e1345c36473df3694a4569a1b0e916faa12a9d47f1e51
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. F. Carbone\, Laboratory for Ultrafast Microscopy and Ele
 ctron Scattering - EPFL\nDynamical information of spin degrees of freedom 
 of proteins or solids can be obtained by nuclear magnetic resonance (NMR).
  A technique with similar versatility for charge degrees of freedom and th
 eir ultrafast correlations could move forward the understanding of systems
  like high-Tc cuprates. By perturbing the superconducting state in a cupra
 te using a femtosecond laser pulse we generate coherent oscillations of th
 e Cooper pairs which can be described by NMR-like equations. The oscillati
 ons are detected by transient broad band reflectivity and found to resonat
 e at the typical scale of Mott physics (2.6 eV) implying a substantial con
 tribution of non-retarded interactions to the pairing\, as in unconvention
 al (non Migdal-Eliashberg) theories.
LOCATION:PH L1 503 http://plan.epfl.ch/?room=PHL1503
STATUS:CONFIRMED
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