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arXiv · 1203.6083

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

Jianmin Tao·Rohit P. Prasankumar·Elbert E. M. Chia·Antoinette J. Taylor·Jian-Xin Zhu
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Abstract

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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Jianmin Tao, Rohit P. Prasankumar, Elbert E. M. Chia, Antoinette J. Taylor, Jian-Xin Zhu. 2012-03-27. Theory of ultrafast quasiparticle dynamics in high-temperature superconductors: Pump fluence dependence. https://doi.org/10.1103/physrevb.85.144302

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