Frustrated phonon with charge density wave in vanadium Kagome metal
Abstract The formation of a star-of-David charge density wave superstructure, resulting from the coordinated displacements of vanadium ions on a corner-sharing triangular lattice, has garnered significant attention to comprehend the influence of electron–phonon interaction within geometrically intri...
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Nature Portfolio
2025-05-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-60219-0 |
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| author | Seung-Phil Heo Choongjae Won Heemin Lee Hanbyul Kim Eunyoung Park Sung Yun Lee Junha Hwang Hyeongi Choi Sang-Youn Park Byungjune Lee Woo-Suk Noh Hoyoung Jang Jae-Hoon Park Dongbin Shin Changyong Song |
| author_facet | Seung-Phil Heo Choongjae Won Heemin Lee Hanbyul Kim Eunyoung Park Sung Yun Lee Junha Hwang Hyeongi Choi Sang-Youn Park Byungjune Lee Woo-Suk Noh Hoyoung Jang Jae-Hoon Park Dongbin Shin Changyong Song |
| author_sort | Seung-Phil Heo |
| collection | DOAJ |
| description | Abstract The formation of a star-of-David charge density wave superstructure, resulting from the coordinated displacements of vanadium ions on a corner-sharing triangular lattice, has garnered significant attention to comprehend the influence of electron–phonon interaction within geometrically intricate lattice of Kagome metals, specifically AV3Sb5 (where A represents K, Rb, or Cs). However, understanding of the underlying mechanism behind charge density wave formation, coupled with symmetry-protected lattice vibrations, remains elusive. Here, from femtosecond time-resolved X-ray scattering experiments, we reveal that the phonon mode, associated with cesium ions’ out-of-plane motion, becomes frustrated in the charge density wave phase. Furthermore, we observed the photoinduced emergence of a metastable charge density wave phase, facilitated by alleviating the frustration. By not only elucidating the longstanding puzzle surrounding the intervention of phonons but introducing the phononic frustration, this research offers insights into the competition between phonons and periodic lattice distortions, a phenomenon widespread in other correlated quantum materials including layered high-temperature superconductors. |
| format | Article |
| id | doaj-art-5458b4540f754a099013f04949f0eeb2 |
| institution | OA Journals |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-5458b4540f754a099013f04949f0eeb22025-08-20T02:03:36ZengNature PortfolioNature Communications2041-17232025-05-011611810.1038/s41467-025-60219-0Frustrated phonon with charge density wave in vanadium Kagome metalSeung-Phil Heo0Choongjae Won1Heemin Lee2Hanbyul Kim3Eunyoung Park4Sung Yun Lee5Junha Hwang6Hyeongi Choi7Sang-Youn Park8Byungjune Lee9Woo-Suk Noh10Hoyoung Jang11Jae-Hoon Park12Dongbin Shin13Changyong Song14Department of Physics, POSTECHCenter for Complex Phase Materials, Max Planck POSTECH/Korea Research InitiativeDepartment of Physics, POSTECHDepartment of Physics and Photon Science, Gwangju Institute of Science and TechnologyDepartment of Physics, POSTECHDepartment of Physics, POSTECHDepartment of Physics, POSTECHPohang Accelerator Laboratory, POSTECHPohang Accelerator Laboratory, POSTECHDepartment of Physics, POSTECHCenter for Complex Phase Materials, Max Planck POSTECH/Korea Research InitiativePhoton Science Center, POSTECH 37673Department of Physics, POSTECHDepartment of Physics and Photon Science, Gwangju Institute of Science and TechnologyDepartment of Physics, POSTECHAbstract The formation of a star-of-David charge density wave superstructure, resulting from the coordinated displacements of vanadium ions on a corner-sharing triangular lattice, has garnered significant attention to comprehend the influence of electron–phonon interaction within geometrically intricate lattice of Kagome metals, specifically AV3Sb5 (where A represents K, Rb, or Cs). However, understanding of the underlying mechanism behind charge density wave formation, coupled with symmetry-protected lattice vibrations, remains elusive. Here, from femtosecond time-resolved X-ray scattering experiments, we reveal that the phonon mode, associated with cesium ions’ out-of-plane motion, becomes frustrated in the charge density wave phase. Furthermore, we observed the photoinduced emergence of a metastable charge density wave phase, facilitated by alleviating the frustration. By not only elucidating the longstanding puzzle surrounding the intervention of phonons but introducing the phononic frustration, this research offers insights into the competition between phonons and periodic lattice distortions, a phenomenon widespread in other correlated quantum materials including layered high-temperature superconductors.https://doi.org/10.1038/s41467-025-60219-0 |
| spellingShingle | Seung-Phil Heo Choongjae Won Heemin Lee Hanbyul Kim Eunyoung Park Sung Yun Lee Junha Hwang Hyeongi Choi Sang-Youn Park Byungjune Lee Woo-Suk Noh Hoyoung Jang Jae-Hoon Park Dongbin Shin Changyong Song Frustrated phonon with charge density wave in vanadium Kagome metal Nature Communications |
| title | Frustrated phonon with charge density wave in vanadium Kagome metal |
| title_full | Frustrated phonon with charge density wave in vanadium Kagome metal |
| title_fullStr | Frustrated phonon with charge density wave in vanadium Kagome metal |
| title_full_unstemmed | Frustrated phonon with charge density wave in vanadium Kagome metal |
| title_short | Frustrated phonon with charge density wave in vanadium Kagome metal |
| title_sort | frustrated phonon with charge density wave in vanadium kagome metal |
| url | https://doi.org/10.1038/s41467-025-60219-0 |
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