SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 19: Poster: Ultrafast Electron Dynamics at Surface and Interfaces I
O 19.4: Poster
Montag, 27. März 2023, 18:00–20:00, P2/EG
Ultrafast all-optical manipulation of the charge-density-wave in VTe2 — •Manuel Tuniz1, Wibke Bronsch2, Denny Puntel1, Davide Soranzio3, Davide Bidoggia1, Steven Johnson3, 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
By means of broadband time-resolved optical spectroscopy (TR-OS) we investigated the ultrafast reflectivity changes caused by collective and single particle excitations in the charge-density wave (CDW) system VTe2. This material has been recently subject of investigation since the modifications in its electronic structure triggered by the CDW formation are strongly orbital-dependent and may give rise to a topological change in specific bands [1]. In our contribution, we show by means of TR-OS measurements the possibility to optically excite the amplitude mode (AM) of the CDW phase and therefore couple to the CDW condensate [2]. Moreover, through double pump experiments, we show the possibility to control the intensity and the phase of the amplitude mode of the system.
References
[1] Mitsuishi, N. et al. Nat. Commun. 11, 2466 (2020).
[2] Schaefer, H. et al. Phys. Rev. B 89, 045106 (2014).