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arXiv · 1609.04080

Amplitude mode oscillations in pump-probe photoemission spectra from a d-wave superconductor

B. Nosarzewski·B. Moritz·J. K. Freericks·A. F. Kemper·T. P. Devereaux
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Abstract

Recent developments in the techniques of ultrafast pump-probe photoemission have made possible the search for collective modes in strongly correlated systems out of equilibrium. Including inelastic scattering processes and a retarded interaction, we simulate time- and angle- resolved photoemission spectroscopy (trARPES) to study the amplitude mode of a d-wave superconductor, a collective mode excited through the nonlinear light-matter coupling to the pump pulse. We find that the amplitude mode oscillations of the d-wave order parameter occur in phase at a single frequency that is twice the quasi-steady-state maximum gap size after pumping. We comment on the necessary conditions for detecting the amplitude mode in trARPES experiments.

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B. Nosarzewski, B. Moritz, J. K. Freericks, A. F. Kemper, T. P. Devereaux. 2017-11-20. Amplitude mode oscillations in pump-probe photoemission spectra from a d-wave superconductor. https://doi.org/10.1103/physrevb.96.184518

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