Workshop on Ultrafast Dynamics in Strongly Correlated Systems

Session

High-Tc superconductors

T9

6 Apr 2011, 13:00

ETH Zurich, Campus Science City, HIT Building

Description

Chair: U. Staub

1. The symmetry and strength of the electron-phonon coupling in cuprates single crystals by Ultrafast Electron Crystallography.

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...

29. Momentum-resolved ultrafast electron dynamics in superconducting BSCCO

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...

5. Ultrafast electric field gating of quantum transport in a cuprate superconductor

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....

9. Ultrafast transient response and electron-phonon coupling in the iron-pnictide superconductor Ba(Fe1-xCox)2As2

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...