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Dresden 2017 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 62: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 1

TT 62.4: Talk

Thursday, March 23, 2017, 10:15–10:30, HSZ 304

Higgs-modes in non-equilibrium dx2y2-wave superconductors — •Andreas P. Schnyder1, Holger Krull2, Götz S. Uhrig2, Nikolaj Bittner1, and Dirk Manske11Max Planck Institute for Solid State Research, 70569 Stuttgart — 2Technische Univerität Dortmund, 44221 Dortmund

The recently developed time-resolved ARPES technique has made it possible to measure collective modes in non-equilibrium quantum systems. Using an iterated equation of motion approach, we investigate the collective Higgs modes of non-equilibrium dx2y2-wave superconductors and simulate the corresponding time-resolved ARPES spectra. We find that in dx2y2-wave superconductors two different Higgs modes can be excited by the pump pulse. The relative strength of these two Higgs modes is controlled by the incident angle of the pump pulse. We determine the signatures of these Higgs modes in the time-resolved ARPES response.

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