Non-retarded pairing interaction in a high-Tc cuprate from coherent charge fluctuation spectroscopy
Event details
| Date | 06.07.2012 |
| Hour | 14:00 |
| Speaker | Prof. F. Carbone, Laboratory for Ultrafast Microscopy and Electron Scattering - EPFL |
| Location | |
| Category | Conferences - Seminars |
Dynamical 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 their ultrafast correlations could move forward the understanding of systems like high-Tc cuprates. By perturbing the superconducting state in a cuprate using a femtosecond laser pulse we generate coherent oscillations of the Cooper pairs which can be described by NMR-like equations. The oscillations are detected by transient broad band reflectivity and found to resonate at the typical scale of Mott physics (2.6 eV) implying a substantial contribution of non-retarded interactions to the pairing, as in unconventional (non Migdal-Eliashberg) theories.
Practical information
- Informed public
- Free
Organizer
- ICMP
Contact
- Arnaud Magrez