Coherent Modulation of Quasiparticle Scattering Rates in a Photoexcited Charge-Density-Wave System

Abstract

We present a complementary experimental and theoretical investigation of relaxation dynamics in the charge-density-wave (CDW) system TbTe${}_3$ after ultrafast optical excitation. Using time- and angle-resolved photoemission spectroscopy, we observe an unusual transient modulation of the relaxation rates of excited photocarriers. A detailed analysis of the electron self-energy based on a nonequilibrium Green's function formalism reveals that the phase space of electron-electron scattering is critically modulated by the photoinduced collective CDW excitation, providing an intuitive microscopic understanding of the observed dynamics and revealing the impact of the electronic band structure on the self-energy.

6 pages, 4 figures

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Cited by in corpus (6)

• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Real and Reciprocal Space Characterization of the 3-Dimensional Charge Density Wave in Quasi-1-Dimensional CuTe
• High-resolution MHz time- and angle-resolved photoemission spectroscopy based on a tunable vacuum ultraviolet source
• Clustering-Enhanced Time- and Angle-Resolved Photoemission Study of LaTe${}_3$: Absence of a Photoinduced Secondary CDW in the Electronic Structure
• Ultrafast dynamics of atomic correlated disordering in photoinduced VO${}_2$
• Distinct amplitude mode dynamics upon resonant and off-resonant excitation across the charge density wave energy gap in LaTe3 investigated by time- and angle-resolved photoemission spectroscopy