Uniaxial strain tuning of charge modulation and singularity in a kagome superconductor.

ABSTRACT: Tunable quantum materials hold great potential for applications. Of special interest are materials in which small lattice strain induces giant electronic responses. The kagome compounds AV₃Sb₅ (A = K, Rb, Cs) provide a testbed for electronic tunable states. In this study, through angle-resolved photoemission spectroscopy, we provide comprehensive spectroscopic measurements of the electronic responses induced by compressive and tensile strains on the charge-density-wave (CDW) and van Hove singularity (VHS) in CsV₃Sb₅. We observe a tripling of the CDW gap magnitudes with  ~ 1% strain. Simultaneously, changes of both energy and mass of the VHS are observed. Combined, this reveals an anticorrelation between the unconventional CDW order parameter and

SUBMITTER: Lin C 

PROVIDER: S-EPMC11612471 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature