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DY: Fachverband Dynamik und Statistische Physik

DY 47: Superconductivity: Higgs Modes in Condensed Matter and Quantum Gases (joint session TT/ DY/ MA/ O)

DY 47.6: Vortrag

Donnerstag, 19. März 2015, 11:00–11:15, H 2053

Nonequlibrium dynamics of s- and d-wave superconductors — •Holger Krull², Götz S. Uhrig¹, Andreas P. Schnyder², and Dirk Manske² — ¹TU Dortmund, Dortmund, Germany — ²Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany

We study the nonequilibrium dynamics of s- and d-wave superconductors, which are induced by a ultra-short pump pulse or a quench, respectively. The dynamics is studied by use of the density matrix formalism as well as by analytical calculation. We focus on the temporal evolution of the order parameter. For s-wave superconductors the nonadiabatic evolution of the order parameter is well established in the collisionless regime. It shows a 1/√t decaying oscillation, which can be interpreted as Higgs mode in a superconductor. Here, we consider the evolution of a d-wave order parameter and compare it with the s-wave case.