Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES
Abstract The interplay between different degrees of freedom governs the emergence of correlated electronic states in quantum materials, with charge density waves (CDW) often coexisting with other exotic phases. Under thermal equilibrium, traditional CDW states are consequentially accompanied by stru...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-02-01
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| Series: | npj Quantum Materials |
| Online Access: | https://doi.org/10.1038/s41535-025-00742-x |
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| author | Shaofeng Duan Binshuo Zhang Zihao Wang Shichong Wang Lingxiao Gu Haoran Liu Jiongyu Huang Jianzhe Liu Dong Qian Yanfeng Guo Wentao Zhang |
| author_facet | Shaofeng Duan Binshuo Zhang Zihao Wang Shichong Wang Lingxiao Gu Haoran Liu Jiongyu Huang Jianzhe Liu Dong Qian Yanfeng Guo Wentao Zhang |
| author_sort | Shaofeng Duan |
| collection | DOAJ |
| description | Abstract The interplay between different degrees of freedom governs the emergence of correlated electronic states in quantum materials, with charge density waves (CDW) often coexisting with other exotic phases. Under thermal equilibrium, traditional CDW states are consequentially accompanied by structural phase transitions. In contrast, ultrafast photoexcitation allows access to exotic states where a single degree of freedom dominates in the time domain, enabling the study of underlying physics without interference. Here, we report the realization of a long-lived metastable CDW state without lattice distortion at the photoinduced interfaces in GdTe3 using time- and angle-resolved photoemission spectroscopy. After optical excitation above the CDW melting threshold, we identified emerged metastable interfaces through inverting the CDW-coupled lattice distortions, with lifetimes on the order of 10 picoseconds. These photoinduced interfaces represent a novel CDW state lacking the usual amplitude mode and lattice distortions, allowing quantification of the dominant role of electronic instabilities in CDW order. This work provides a new approach to disentangling electronic instabilities from electron-phonon coupling using a nonequilibrium method. |
| format | Article |
| id | doaj-art-53280de695884221b07b2095e8f8f52f |
| institution | Kabale University |
| issn | 2397-4648 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Materials |
| spelling | doaj-art-53280de695884221b07b2095e8f8f52f2025-02-09T12:10:45ZengNature Portfolionpj Quantum Materials2397-46482025-02-011011710.1038/s41535-025-00742-xIdentification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPESShaofeng Duan0Binshuo Zhang1Zihao Wang2Shichong Wang3Lingxiao Gu4Haoran Liu5Jiongyu Huang6Jianzhe Liu7Dong Qian8Yanfeng Guo9Wentao Zhang10Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesSchool of Physical Science and Technology, ShanghaiTech UniversityKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong UniversityKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong UniversityKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong UniversityKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong UniversityKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong UniversityKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong UniversityKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong UniversitySchool of Physical Science and Technology, ShanghaiTech UniversityBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesAbstract The interplay between different degrees of freedom governs the emergence of correlated electronic states in quantum materials, with charge density waves (CDW) often coexisting with other exotic phases. Under thermal equilibrium, traditional CDW states are consequentially accompanied by structural phase transitions. In contrast, ultrafast photoexcitation allows access to exotic states where a single degree of freedom dominates in the time domain, enabling the study of underlying physics without interference. Here, we report the realization of a long-lived metastable CDW state without lattice distortion at the photoinduced interfaces in GdTe3 using time- and angle-resolved photoemission spectroscopy. After optical excitation above the CDW melting threshold, we identified emerged metastable interfaces through inverting the CDW-coupled lattice distortions, with lifetimes on the order of 10 picoseconds. These photoinduced interfaces represent a novel CDW state lacking the usual amplitude mode and lattice distortions, allowing quantification of the dominant role of electronic instabilities in CDW order. This work provides a new approach to disentangling electronic instabilities from electron-phonon coupling using a nonequilibrium method.https://doi.org/10.1038/s41535-025-00742-x |
| spellingShingle | Shaofeng Duan Binshuo Zhang Zihao Wang Shichong Wang Lingxiao Gu Haoran Liu Jiongyu Huang Jianzhe Liu Dong Qian Yanfeng Guo Wentao Zhang Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES npj Quantum Materials |
| title | Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES |
| title_full | Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES |
| title_fullStr | Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES |
| title_full_unstemmed | Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES |
| title_short | Identification of metastable lattice distortion free charge density wave at photoinduced interface via TRARPES |
| title_sort | identification of metastable lattice distortion free charge density wave at photoinduced interface via trarpes |
| url | https://doi.org/10.1038/s41535-025-00742-x |
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