Two types of charge order with distinct interplay with superconductivity in the kagome material CsV3Sb5

Ritu Gupta, Debarchan Das, Charles Mielke, Ethan Ritz, Fabian Hotz, Qiangwei Yin, Zhijun Tu, Chunsheng Gong, Hechang Lei, Turan Birol, Rafael M. Fernandes, Zurab Guguchia, Hubertus Luetkens, Rustem Khasanov

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The kagome metals of the family AV3Sb5, featuring a unique structural motif, harbor an array of intriguing phenomena such as chiral charge order and superconductivity. CsV3Sb5 is of particular interest because it displays a double superconducting dome in the region of the temperature-pressure phase diagram where charge order is still present. However, the microscopic origin of such an unusual behavior remains an unsolved issue. Here, to address it, we combine high-pressure, low-temperature muon spin relaxation/rotation with first-principles calculations. We observe a pressure-induced threefold enhancement of the superfluid density, which also displays a double-peak feature, similar to the superconducting critical temperature. This leads to three distinct regions in the phase diagram, each of which features distinct slopes of the linear relation between superfluid density and the critical temperature. These results are attributed to a possible evolution of the charge order pattern from the superimposed tri-hexagonal Star-of-David phase at low pressures (within the first dome) to the staggered tri-hexagonal phase at intermediate pressures (between the first and second domes). Our findings suggest a change in the nature of the charge-ordered state across the phase diagram of CsV3Sb5, with varying degrees of competition with superconductivity.

Original languageEnglish (US)
Article number232
JournalCommunications Physics
Volume5
Issue number1
DOIs
StatePublished - Dec 2022

Bibliographical note

Funding Information:
We thank B. Andersen and M. Christensen for fruitful discussions. μSR experiments were performed at the Swiss Muon Source (SμS), Paul Scherrer Institute (PSI), Switzerland. H.L. was supported by National Key R&D Program of China (Grant No. 2018YFE0202600) and the Beijing Natural Science Foundation (Grant No. Z200005). T.B. and E.T.R. were supported by the NSF CAREER grant DMR-2046020. RMF (theory) was supported by the Air Force Office of Scientific Research under award number FA9550-21-1-0423.

Funding Information:
We thank B. Andersen and M. Christensen for fruitful discussions. μSR experiments were performed at the Swiss Muon Source (SμS), Paul Scherrer Institute (PSI), Switzerland. H.L. was supported by National Key R&D Program of China (Grant No. 2018YFE0202600) and the Beijing Natural Science Foundation (Grant No. Z200005). T.B. and E.T.R. were supported by the NSF CAREER grant DMR-2046020. RMF (theory) was supported by the Air Force Office of Scientific Research under award number FA9550-21-1-0423.

Publisher Copyright:
© 2022, The Author(s).

Fingerprint

Dive into the research topics of 'Two types of charge order with distinct interplay with superconductivity in the kagome material CsV3Sb5'. Together they form a unique fingerprint.

Cite this