Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi-1D Topological Insulator ZrTe₅.

ABSTRACT: The transition metal pentatelluride ZrTe₅ exhibits rich lattice-sensitive topological electronic states, and demonstrates great potential in photoelectric and thermoelectric devices. However, a comprehensive investigation of electron-phonon coupling and phonon scattering process remains limited, despite their importance for transport properties and device optimization. Here, the hot carrier dynamics and a 1.15 THz A_g mode coherent phonon in ZrTe₅ are investigated by femtosecond transient spectroscopy across 10-300 K. Notably, polarization-dependent measurements explicitly decouple a strong anisotropic transient response, which is attributed to the effects of excited-state electron relaxation and reflectivity modulation by displacive excited coherent phonons

SUBMITTER: Hou Y 

PROVIDER: S-EPMC12376609 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature