Light-induced renormalization of the band structure of chiral tellurium
Chirality in tellurium arises from a Peierls distortion driven by strong electron-phonon coupling, making this material a unique candidate for observing a light-induced topological phase transition. 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 ${\mathrm{A}}_{1\mathrm{g}}$ symmetry as well as chiral-symmetry-breaking ${\mathrm{E}}_{\mathrm{LO}}^{\ensuremath{'}}$ modes. By comparison with state-of-the-art $\mathrm{TDDFT}+\mathrm{U}$ calculations, we reveal the microscopic origin of the in-phase oscillations of band edges, owing to phonon-induced modulation of the effective Hubbard $U$ term.
Authors
- Fabio Frassetto (ORCID: https://orcid.org/0000-0001-5528-1995)
- M. Grioni (ORCID: https://orcid.org/0000-0003-3338-412X)
- Hannes Hübener (ORCID: https://orcid.org/0000-0003-0105-1427)
- A. Crepaldi (ORCID: https://orcid.org/0000-0001-9971-1731)
- Nicolas Tancogne-Dejean (ORCID: https://orcid.org/0000-0003-1383-4824)
- Michele Puppin (ORCID: https://orcid.org/0000-0002-1328-7165)
- Luca Poletto (ORCID: https://orcid.org/0000-0002-0914-0531)
- Umberto De Giovannini (ORCID: https://orcid.org/0000-0002-4899-1304)
- Majed Chergui (ORCID: https://orcid.org/0000-0002-4856-226X)
- Jianhua Dai (ORCID: https://orcid.org/0000-0003-1459-0833)
- S. Polishchuk (ORCID: https://orcid.org/0000-0001-5535-0479)
- Ángel Rubio (ORCID: https://orcid.org/0000-0003-2060-3151)
- G. Gatti (ORCID: https://orcid.org/0000-0002-2048-1791)
- Ph. Bugnon
Institutions
- University of Geneva (CH)
- University of the Basque Country (ES)
- ALBA Synchrotron (Spain) (ES)
- Center for Biomolecular Nanotechnologies (IT)
- Max Planck Institute for the Structure and Dynamics of Matter (DE)
- Flatiron Health (United States) (US)
- National Research Council (IT)
- Flatiron Institute (US)
- École Polytechnique Fédérale de Lausanne (CH)
- University of Palermo (IT)
- Politecnico di Milano (IT)
Publication Details
- Journal
- Physical Review Materials
- Published
- 2024-12-24
- DOI
- https://doi.org/10.1103/physrevmaterials.8.125001
- Citations
- 2
- Primary Topic
- Solid-state spectroscopy and crystallography
- Type
- article
- Field-Weighted Citation Impact
- 0.23
Funders
- National Science Foundation
- U.S. Department of Energy
- American Institute of Mathematics
- Flatiron Health
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Politecnico di Milano
- Office of Science
- Horizon 2020 Framework Programme
- H2020 European Research Council