Large Fermi surface in pristine kagome metal CsV3Sb5 and enhanced quasiparticle effective masses

Zhang，Wei1; Poon，Tsz Fung1; Tsang，Chun Wai1; Wang，Wenyan1; Liu，X.1; Xie，J.1; Lam，S. T.1; Wang，Shanmin2; Lai，Kwing To1,3; Pourret，A.4; Seyfarth，G.5,6; Knebel，G.4; Yu，Wing Chi7; Goh，Swee K.1

2024-05-21

10.1073/pnas.2322270121

Proceedings of the National Academy of Sciences of the United States of America   影响因子和分区

1091-6490

The kagome metal CsV[Formula: see text]Sb[Formula: see text] is an ideal platform to study the interplay between topology and electron correlation. To understand the fermiology of CsV[Formula: see text]Sb[Formula: see text], intensive quantum oscillation (QO) studies at ambient pressure have been conducted. However, due to the Fermi surface reconstruction by the complicated charge density wave (CDW) order, the QO spectrum is exceedingly complex, hindering a complete understanding of the fermiology. Here, we directly map the Fermi surface of the pristine CsV[Formula: see text]Sb[Formula: see text] by measuring Shubnikov-de Haas QOs up to 29 T under pressure, where the CDW order is completely suppressed. The QO spectrum of the pristine CsV[Formula: see text]Sb[Formula: see text] is significantly simpler than the one in the CDW phase, and the detected oscillation frequencies agree well with our density functional theory calculations. In particular, a frequency as large as 8,200 T is detected. Pressure-dependent QO studies further reveal a weak but noticeable enhancement of the quasiparticle effective masses on approaching the critical pressure where the CDW order disappears, hinting at the presence of quantum fluctuations. Our high-pressure QO results reveal the large, unreconstructed Fermi surface of CsV[Formula: see text]Sb[Formula: see text], paving the way to understanding the parent state of this intriguing metal in which the electrons can be organized into different ordered states.

CDW quantum phase transition kagome metal pristine CsV3Sb5 quantum oscillations

英语

其他

BIOLOGY & BIOCHEMISTRY ; CLINICAL MEDICINE ; MULTIDISCIPLINARY ; PLANT & ANIMAL SCIENCE ; ENVIRONMENT/ECOLOGY ; SOCIAL SCIENCES, GENERAL ; MICROBIOLOGY ; ECONOMICS BUSINESS ; IMMUNOLOGY ; MATERIALS SCIENCE ; MATHEMATICS ; SPACE SCIENCE ; MOLECULAR BIOLOGY & GENETICS ; PHARMACOLOGY & TOXICOLOGY ; CHEMISTRY ; PSYCHIATRY/PSYCHOLOGY ; NEUROSCIENCE & BEHAVIOR ; PHYSICS ; GEOSCIENCES ; AGRICULTURAL SCIENCES ; ENGINEERING

2-s2.0-85193493078

Scopus

1.Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China
2.Department of Physics,Southern University of Science and Technology,Shenzhen,518005,China
3.Shenzhen Research Institute, The Chinese University of Hong Kong, Shatin, Hong Kong, China
4.Université Grenoble Alpes,Commissariat à l'énergie atomique et aux énergies alternatives,Institut polytechnique de Grenoble,Institut de recherche interdisciplinaire de Grenoble,Laboratoire Photonique Electronique et Ingénierie Quantiques,Grenoble,38000,France
5.Laboratoire National des Champs Magnétiques Intenses,Université Grenoble Alpes,Grenoble,38000,France
6.Laboratoire National des Champs Magnétiques Intenses,Centre National de la Recherche Scientifique,Université Paul Sabatier Toulouse 3,Institut National des Sciences Appliquées Toulouse,European Magnetic Field Laboratory,Grenoble,38000,France
7.Department of Physics, City University of Hong Kong, Kowloon, Hong Kong, China

Zhang，Wei,Poon，Tsz Fung,Tsang，Chun Wai,et al. Large Fermi surface in pristine kagome metal CsV3Sb5 and enhanced quasiparticle effective masses[J]. Proceedings of the National Academy of Sciences of the United States of America,2024,121(21).

Zhang，Wei.,Poon，Tsz Fung.,Tsang，Chun Wai.,Wang，Wenyan.,Liu，X..,...&Goh，Swee K..(2024).Large Fermi surface in pristine kagome metal CsV3Sb5 and enhanced quasiparticle effective masses.Proceedings of the National Academy of Sciences of the United States of America,121(21).

Zhang，Wei,et al."Large Fermi surface in pristine kagome metal CsV3Sb5 and enhanced quasiparticle effective masses".Proceedings of the National Academy of Sciences of the United States of America 121.21(2024).