Discovery of a New Phase in Thin Flakes of KV<sub>3</sub>Sb<sub>5</sub> under Pressure
Results of magnetotransport measurements are reported on KV<sub>3</sub>Sb<sub>5</sub> thin flakes under pressure. The zero-field electrical resistance reveals an additional anomaly emerging under pressure (p), marking a previously unidentified phase boundary T*(p). Together with the established T<sub>CDW</sub>(p) and T<sub>c</sub>(p), denoting the charge-density-wave transition and a superconducting transition, respectively, the temperature-pressure phase diagram of KV<sub>3</sub>Sb<sub>5</sub> features a rich interplay among multiple phases. The Hall coefficient evolves reasonably smoothly when crossing the T* phase boundary compared with the variation when crossing T<sub>CDW</sub>, indicating the preservation of the pristine electronic structure. The mobility spectrum analysis provides further insights into distinguishing different phases. Finally, the high-pressure quantum oscillation studies up to 31 T combined with the density functional theory calculations further demonstrate that the new phase does not reconstruct the Fermi surface, confirming that the translational symmetry of the pristine metallic state is preserved.
Authors
- Wenyan Wang (ORCID: https://orcid.org/0000-0003-4242-4955)
- Swee K. Goh (ORCID: https://orcid.org/0000-0002-6265-5446)
- G. Knebel (ORCID: https://orcid.org/0000-0002-0442-6362)
- Zheyu Wang (ORCID: https://orcid.org/0000-0001-6037-6219)
- Shanmin Wang (ORCID: https://orcid.org/0000-0001-7273-2786)
- Chun Wai Tsang (ORCID: https://orcid.org/0000-0002-4978-6599)
- Tsz Fung Poon (ORCID: https://orcid.org/0000-0002-0673-0595)
- King Yau Yip (ORCID: https://orcid.org/0000-0002-1431-5025)
- Kwing To Lai (ORCID: https://orcid.org/0000-0001-9935-202X)
- David E Graf (ORCID: https://orcid.org/0000-0001-6195-0462)
- Wing Chi Yu (ORCID: https://orcid.org/0000-0001-6569-0135)
- G. Seyfarth (ORCID: https://orcid.org/0000-0002-0663-1191)
- Alexandre Pourret (ORCID: https://orcid.org/0000-0003-1616-8492)
- Wei Zhang (ORCID: https://orcid.org/0000-0003-2995-9664)
- Lingfei Wang (ORCID: https://orcid.org/0000-0003-1675-0941)
- Ying Kit Tsui
Institutions
- Florida State University (US)
- Institut polytechnique de Grenoble (FR)
- Centre National de la Recherche Scientifique (FR)
- City University of Hong Kong (HK)
- Chinese University of Hong Kong (HK)
- Institut National des Sciences Appliquées de Toulouse (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- CEA Grenoble (FR)
- Southern University of Science and Technology (CN)
- Laboratoire National des Champs Magnétiques Intenses (FR)
- National High Magnetic Field Laboratory (US)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Advanced Science
- Published
- 2025-02-28
- DOI
- https://doi.org/10.1002/advs.202415012
- Citations
- 3
- Primary Topic
- Rare-earth and actinide compounds
- Type
- article
- Field-Weighted Citation Impact
- 3.77
Funders
- National Science Foundation
- City University of Hong Kong
- National High Magnetic Field Laboratory
- Agence Nationale de la Recherche
- National Natural Science Foundation of China
- Centre National de la Recherche Scientifique
- Chinese University of Hong Kong
- Basic and Applied Basic Research Foundation of Guangdong Province
- Division of Materials Research
- High Magnetic Field Laboratory, Chinese Academy of Sciences
- CHIST-ERA