Ultrafast all-optical manipulation of the charge-density-wave in VTe$_{2}$
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866911745095761920 |
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| author | Tuniz, Manuel Soranzio, Davide Bidoggia, Davide Puntel, Denny Bronsch, Wibke Johnson, Steven L. Peressi, Maria Parmigiani, Fulvio Cilento, Federico |
| author_facet | Tuniz, Manuel Soranzio, Davide Bidoggia, Davide Puntel, Denny Bronsch, Wibke Johnson, Steven L. Peressi, Maria Parmigiani, Fulvio Cilento, Federico |
| contents | The charge-density wave (CDW) phase in the layered transition-metal dichalcogenide VTe$_{2}$ 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, by means of broadband time-resolved optical spectroscopy (TR-OS), we investigate the ultrafast reflectivity changes caused by collective and single particle excitations in the CDW ground state of VTe$_{2}$. Remarkably, our measurements show 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, demonstrating a more efficient way to control and perturb the CDW phase in VTe$_{2}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_03528 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Ultrafast all-optical manipulation of the charge-density-wave in VTe$_{2}$ Tuniz, Manuel Soranzio, Davide Bidoggia, Davide Puntel, Denny Bronsch, Wibke Johnson, Steven L. Peressi, Maria Parmigiani, Fulvio Cilento, Federico Strongly Correlated Electrons The charge-density wave (CDW) phase in the layered transition-metal dichalcogenide VTe$_{2}$ 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, by means of broadband time-resolved optical spectroscopy (TR-OS), we investigate the ultrafast reflectivity changes caused by collective and single particle excitations in the CDW ground state of VTe$_{2}$. Remarkably, our measurements show 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, demonstrating a more efficient way to control and perturb the CDW phase in VTe$_{2}$. |
| title | Ultrafast all-optical manipulation of the charge-density-wave in VTe$_{2}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2305.03528 |