Quench of the electronic order in a strongly-coupled charge-density-wave system by enhanced lattice fluctuations
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866910861614907392 |
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| author | Tuniz, Manuel Puntel, Denny Bronsch, Wibke Sammartino, Francesco Pierantozzi, Gian Marco Cucini, Riccardo Parmigiani, Fulvio Cilento, Federico |
| author_facet | Tuniz, Manuel Puntel, Denny Bronsch, Wibke Sammartino, Francesco Pierantozzi, Gian Marco Cucini, Riccardo Parmigiani, Fulvio Cilento, Federico |
| contents | Charge-density-wave (CDW) materials having a strong electron-phonon coupling provide a powerful platform for investigating the intricate interplay between lattice fluctuations and a macroscopic quantum order. Using time- and angle-resolved photoemission spectroscopy (TR-ARPES), we reveal that the CDW gap closure in VTe2 is dominated by an incoherent process evolving on a sub-picosecond timescale, challenging the conventional view that the gap dynamics is primarily governed by the excitation of the CDW amplitude modes. Our findings, supported by a three-temperature model, show that the CDW gap evolution can be described by considering the population of a subset of strongly-coupled optical phonon modes, which leads to an increase in the lattice fluctuations. This microscopic framework extends beyond VTe2, offering a universal perspective for understanding the light-induced phase transition in strongly-coupled CDW systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_04658 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quench of the electronic order in a strongly-coupled charge-density-wave system by enhanced lattice fluctuations Tuniz, Manuel Puntel, Denny Bronsch, Wibke Sammartino, Francesco Pierantozzi, Gian Marco Cucini, Riccardo Parmigiani, Fulvio Cilento, Federico Strongly Correlated Electrons Charge-density-wave (CDW) materials having a strong electron-phonon coupling provide a powerful platform for investigating the intricate interplay between lattice fluctuations and a macroscopic quantum order. Using time- and angle-resolved photoemission spectroscopy (TR-ARPES), we reveal that the CDW gap closure in VTe2 is dominated by an incoherent process evolving on a sub-picosecond timescale, challenging the conventional view that the gap dynamics is primarily governed by the excitation of the CDW amplitude modes. Our findings, supported by a three-temperature model, show that the CDW gap evolution can be described by considering the population of a subset of strongly-coupled optical phonon modes, which leads to an increase in the lattice fluctuations. This microscopic framework extends beyond VTe2, offering a universal perspective for understanding the light-induced phase transition in strongly-coupled CDW systems. |
| title | Quench of the electronic order in a strongly-coupled charge-density-wave system by enhanced lattice fluctuations |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2503.04658 |