Large Fermi surface in pristine kagome metal CsV3Sb5 and enhanced quasiparticle effective masses
Abstract
The Fermi surface of a metal can be reconstructed with the formation of density-wave orders. Oftentimes, it is necessary to understand the Fermi surface of the "pristine" metal before the new order sets in to understand how the instability is formed. This study examines the pristine phase of the kagome metal CsV3Sb5, exposed by applying hydrostatic pressure. Our quantum oscillation results reveal the existence of large Fermi surfaces when the charge density wave state is melted by pressure. The ability to follow quantum oscillation frequencies under pressure further enables the tracking of quasiparticle effective masses across the charge density wave border. These findings not only emphasize the role of charge density wave on electronic structure but also highlight the tunability of quantum fluctuations in correlated matter.
- Publication:
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Proceedings of the National Academy of Science
- Pub Date:
- May 2024
- DOI:
- 10.1073/pnas.2322270121
- arXiv:
- arXiv:2405.10583
- Bibcode:
- 2024PNAS..12122270Z
- Keywords:
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- Condensed Matter - Superconductivity;
- Condensed Matter - Materials Science;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 4 figures, 1 table. This is the preprint of a published paper in PNAS