SKM 2023 – scientific programme
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O: Fachverband Oberflächenphysik
O 34: Ultrafast Electron Dynamics at Surface and Interfaces III
O 34.10: Talk
Tuesday, March 28, 2023, 13:00–13:15, TRE Phy
Manipulation of the charge-density-wave in VTe2 by femtosecond light pulses — •Manuel Tuniz1, Wibke Bronsch2, Denny Puntel1, Giovanni Di Santo2, Luca Petaccia2, Davide Soranzio3, Davide Bidoggia1, Maria Peressi1, Fulvio Parmigiani1,2, and Federico Cilento2 — 1Dipartimento di Fisica, Università degli Studi di Trieste, Italy — 2Elettra - Sincrotrone Trieste S.C.p.A., Italy — 3Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland
Comparing equilibrium and out-of-equilibrium angle-resolved photoemission spectroscopy (ARPES and tr-ARPES), we investigate the effect of an optical excitation on the electronic properties of the charge-density wave (CDW) system VTe2. Recently, the modification of the material's electronic structure triggered by CDW formation has been discussed because the strongly orbital-dependent changes may give rise to a topological change in specific bands [1]. In our contribution we show clear modifications to the electronic band structure of VTe2 induced by the emergence of the CDW phase. Moreover, our tr-ARPES experiments open the possibility to perturb the CDW phase and study the relaxation dynamics of this non-equilibrium state to the ground state of the system.
[1] Mitsuishi, N. et al. Nat Commun 11, 2466 (2020)