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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.16089 |
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| _version_ | 1866910727615283200 |
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| author | Lin, Chun Consiglio, Armando Forslund, Ola Kenji Kuspert, Julia Denner, M. Michael Lei, Hechang Louat, Alex Watson, Matthew D. Kim, Timur K. Cacho, Cephise Carbone, Dina Leandersson, Mats Polley, Craig Balasubramanian, Thiagarajan Di Sante, Domenico Thomale, Ronny Guguchia, Zurab Sangiovanni, Giorgio Neupert, Titus Chang, Johan |
| author_facet | Lin, Chun Consiglio, Armando Forslund, Ola Kenji Kuspert, Julia Denner, M. Michael Lei, Hechang Louat, Alex Watson, Matthew D. Kim, Timur K. Cacho, Cephise Carbone, Dina Leandersson, Mats Polley, Craig Balasubramanian, Thiagarajan Di Sante, Domenico Thomale, Ronny Guguchia, Zurab Sangiovanni, Giorgio Neupert, Titus Chang, Johan |
| contents | 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 such singular electronic states. In this study, through angle-resolved photoemission spectroscopy, we provide comprehensive spectroscopic measurements of the giant responses induced by compressive and tensile strains on the charge-density-wave (CDW) order parameter and high-order van Hove singularity (HO-VHS) in CsV3Sb5. We observe a tripling of the CDW gap magnitudes with ~1% strain, accompanied by the changes of both energy and mass of the saddle-point fermions. Our results reveal an anticorrelation between the unconventional CDW order parameter and the mass of a HO-VHS, and highlight the role of the latter in the superconducting pairing. The giant electronic responses uncover a rich strain tunability of the versatile kagome system in studying quantum interplays under lattice perturbations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16089 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Uniaxial strain tuning of charge modulation and singularity in a kagome superconductor Lin, Chun Consiglio, Armando Forslund, Ola Kenji Kuspert, Julia Denner, M. Michael Lei, Hechang Louat, Alex Watson, Matthew D. Kim, Timur K. Cacho, Cephise Carbone, Dina Leandersson, Mats Polley, Craig Balasubramanian, Thiagarajan Di Sante, Domenico Thomale, Ronny Guguchia, Zurab Sangiovanni, Giorgio Neupert, Titus Chang, Johan Materials Science Superconductivity 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 such singular electronic states. In this study, through angle-resolved photoemission spectroscopy, we provide comprehensive spectroscopic measurements of the giant responses induced by compressive and tensile strains on the charge-density-wave (CDW) order parameter and high-order van Hove singularity (HO-VHS) in CsV3Sb5. We observe a tripling of the CDW gap magnitudes with ~1% strain, accompanied by the changes of both energy and mass of the saddle-point fermions. Our results reveal an anticorrelation between the unconventional CDW order parameter and the mass of a HO-VHS, and highlight the role of the latter in the superconducting pairing. The giant electronic responses uncover a rich strain tunability of the versatile kagome system in studying quantum interplays under lattice perturbations. |
| title | Uniaxial strain tuning of charge modulation and singularity in a kagome superconductor |
| topic | Materials Science Superconductivity |
| url | https://arxiv.org/abs/2402.16089 |