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

MPG-Autoren
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Sentef,  M. A.
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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PhysRevLett.128.026406.pdf
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Supplemental_Material.pdf
(Ergänzendes Material), 8MB

Zitation

Maklar, J., Schüler, M., Windsor, Y. W., Nicholson, C. W., Puppin, M., Walmsley, P., et al. (2022). Coherent Modulation of Quasiparticle Scattering Rates in a Photoexcited Charge-Density-Wave System. Physical Review Letters, 128(2): 026406. doi:10.1103/PhysRevLett.128.026406.


Zitierlink: https://hdl.handle.net/21.11116/0000-0009-20DC-B
Zusammenfassung
We present a complementary experimental and theoretical investigation of relaxation dynamics in the charge-density-wave (CDW) system TbTe3 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.