- Open Access
Ultrafast all-optical manipulation of the charge-density wave in
Phys. Rev. Research 5, 043276 – Published 21 December, 2023
DOI: https://doi.org/10.1103/PhysRevResearch.5.043276
Abstract
The charge-density-wave (CDW) phase in the layered transition-metal dichalcogenide is strongly coupled to the band inversion involving vanadium and tellurium orbitals. In particular, this coupling leads to a selective disappearance of the Dirac-type states that characterize the normal phase, when the CDW phase sets in. Here, we investigate the broadband time-resolved reflectivity variations caused by collective and single-particle excitations in the CDW ground state of . With the aid of density functional perturbation theory simulations we unveil the presence of two collective amplitude modes of the CDW ground state. By applying a double-pulse excitation scheme, we show the possibility to manipulate these modes, gaining insights into the coupling between these two collective excitations and demonstrating a more efficient way to perturb the CDW phase in .
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References (46)
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