Theory of ultrafast quasiparticle dynamics in high-temperature superconductors: The dependence on pump fluence

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

doi:10.1103/PhysRevB.85.144302

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Theory of ultrafast quasiparticle dynamics in high-temperature superconductors: The dependence on pump fluence

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

DOI 10.1103/PhysRevB.85.144302 · Physical Review B

T1

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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 (B1g) 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 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 reentrant behavior with time delay, following the fate of the superconducting condensate.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	104	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown