Light-induced renormalization of the band structure of chiral tellurium
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arXiv
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916544657752064 |
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| author | Gatti, G. Tancogne-Dejean, N. Hübener, H. De Giovannini, U. Dai, J. Polishchuk, S. Bugnon, Ph. Frassetto, F. Poletto, L. Chergui, M. Grioni, M. Rubio, A. Puppin, M. Crepaldi, A. |
| author_facet | Gatti, G. Tancogne-Dejean, N. Hübener, H. De Giovannini, U. Dai, J. Polishchuk, S. Bugnon, Ph. Frassetto, F. Poletto, L. Chergui, M. Grioni, M. Rubio, A. Puppin, M. Crepaldi, A. |
| contents | Chirality in tellurium derives from a Peierls distortion driven by strong electron-phonon coupling, making this material a unique candidate for observing a light-induced topological phase transition. By using time- and angle-resolved photoelectron spectroscopy (trARPES), we reveal that upon near-infrared photoexcitation the Peierls gap is modulated by displacively excited coherent phonons with $\mathrm{A_{1g}}$ symmetry as well as chiral-symmetry-breaking $\mathrm{E'_{LO}}$ modes. By comparison with state-of-the-art TDDFT+U calculations, we reveal the microscopic origin of the in-phase oscillations of band edges, due to phonon-induced modulation of the effective Hubbard $U$ term. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_13954 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Light-induced renormalization of the band structure of chiral tellurium Gatti, G. Tancogne-Dejean, N. Hübener, H. De Giovannini, U. Dai, J. Polishchuk, S. Bugnon, Ph. Frassetto, F. Poletto, L. Chergui, M. Grioni, M. Rubio, A. Puppin, M. Crepaldi, A. Materials Science Strongly Correlated Electrons Chirality in tellurium derives from a Peierls distortion driven by strong electron-phonon coupling, making this material a unique candidate for observing a light-induced topological phase transition. By using time- and angle-resolved photoelectron spectroscopy (trARPES), we reveal that upon near-infrared photoexcitation the Peierls gap is modulated by displacively excited coherent phonons with $\mathrm{A_{1g}}$ symmetry as well as chiral-symmetry-breaking $\mathrm{E'_{LO}}$ modes. By comparison with state-of-the-art TDDFT+U calculations, we reveal the microscopic origin of the in-phase oscillations of band edges, due to phonon-induced modulation of the effective Hubbard $U$ term. |
| title | Light-induced renormalization of the band structure of chiral tellurium |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2411.13954 |