Coherent Modulation of Quasiparticle Scattering Rates in a Photoexcited Charge-Density-Wave System.
Phys Rev Lett
; 128(2): 026406, 2022 Jan 14.
Article
in En
| MEDLINE
| ID: mdl-35089762
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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2022
Document type:
Article
Affiliation country:
Alemania
Country of publication:
Estados Unidos