Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

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

Lin, Chun ; Consiglio, Armando ; Forslund, Ola Kenji ; Küspert, Julia ; Denner, M. Michael ; Lei, Hechang ; Louat, Alex ; Watson, Matthew D. ; Kim, Timur K. and Cacho, Cephise , et al. (2024) In Nature Communications 15(1).
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... (More)

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 the mass of the VHS, and highlight the role of the latter in the superconducting pairing. The substantial electronic responses uncover a rich strain tunability of the versatile kagome system in studying quantum interplays under lattice variations.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
15
issue
1
article number
10466
publisher
Nature Publishing Group
external identifiers
  • scopus:85211224113
  • pmid:39622808
ISSN
2041-1723
DOI
10.1038/s41467-024-53737-w
language
English
LU publication?
yes
id
afab2238-89ed-4611-beea-3fcb47e5ea23
date added to LUP
2025-01-21 14:32:10
date last changed
2025-08-20 07:51:46
@article{afab2238-89ed-4611-beea-3fcb47e5ea23,
  abstract     = {{<p>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 AV<sub>3</sub>Sb<sub>5</sub> (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 CsV<sub>3</sub>Sb<sub>5</sub>. 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 the mass of the VHS, and highlight the role of the latter in the superconducting pairing. The substantial electronic responses uncover a rich strain tunability of the versatile kagome system in studying quantum interplays under lattice variations.</p>}},
  author       = {{Lin, Chun and Consiglio, Armando and Forslund, Ola Kenji and Küspert, Julia and Denner, M. Michael and Lei, Hechang and Louat, Alex and Watson, Matthew D. and Kim, Timur K. and Cacho, Cephise and Carbone, Dina and Leandersson, Mats and Polley, Craig and Balasubramanian, Thiagarajan and Sante, Domenico Di and Thomale, Ronny and Guguchia, Zurab and Sangiovanni, Giorgio and Neupert, Titus and Chang, Johan}},
  issn         = {{2041-1723}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{Uniaxial strain tuning of charge modulation and singularity in a kagome superconductor}},
  url          = {{http://dx.doi.org/10.1038/s41467-024-53737-w}},
  doi          = {{10.1038/s41467-024-53737-w}},
  volume       = {{15}},
  year         = {{2024}},
}