Theory of ultrafast quasiparticle dynamics in high-temperature superconductors: Pump fluence dependence

Details Theory of ultrafast quasiparticle dynamics in high-temperature superconductors: Pump fluence dependence Theory of ultrafast quasiparticle dynamics in high-temperature superconductors: Pump fluence dependence

2012-03-27

arxiv.org/abs/1203.6083v1

Physics

Condensed Matter

Superconductivity

5 pages, 3 embedded eps figures, to appear in PRB

Scientific paper

We present a theory for the time-resolved optical spectroscopy of high-temperature superconductors at high excitation densities with strongly anisotropic electron-phonon coupling. A signature of the strong coupling between the out-of-plane, out-of-phase O buckling mode ($B_{1g}$) and electronic states near the antinode is observed as a higher-energy peak in the time-resolved optical conductivity and Raman spectra, while no evidence of the strong coupling between the in-plane Cu-O breathing mode and nodal electronic states is observed. More interestingly, it is observed that under appropriate conditions of pump fluence, this signature exhibits a re-entrant behavior with time delay, following the fate of the superconducting condensate.

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