Description
Chair: U. Staub
Fabrizio Carbone
(EPFL)
06/04/2011, 13:00
Invited talk
The phonon-mediated attractive interaction between carriers leads to the Cooper pair formation in conventional superconductors. Despite decades of research, the glue holding Cooper pairs in high-temperature superconducting cuprates is still controversial, and the same is true as for the relative involvement of structural and electronic degrees of freedom. Ultrafast electron crystallography...
Uwe Bovensiepen
(Universität Duisburg-Essen)
06/04/2011, 13:40
Talk
In comparison to metals or semiconductors the decay of hot quasi-particles proceeds in superconductors not only by scattering of quasiparticles among each other and with phonons, but also through Cooper formation. Analysis of Cooper pair formation in the time domain has the potential to shed light on the interaction which is responsible for it. This interaction is well understood for...
Andreas Dienst
(University of Oxford)
06/04/2011, 14:00
Talk
In cuprate superconductors, tunneling between copper-oxide planes constitutes three-dimensional coherent transport. When a phase gradient of the condensate wavefunction is introduced perpendicular to the planes, the interlayer tunneling amplitude is reduced. As such, c-axis superconductivity becomes controllable by an external electric field resulting in a time-dependent phase modulation....
Barbara Mansart
(Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, 91405 Orsay, France)
06/04/2011, 14:20
Talk
The real-time study of out-of-equilibrium states give access to the dynamical excitation and relaxation of electrons close to the Fermi level, tightly related to the structural and electronic properties of the material. We carried out femtosecond pump-probe reflectivity measurements on a novel pnictide high-Tc superconductor, namely Ba(Fe1-xCox)2As2, studying the relaxation dynamics and...
