Bidirectional ultrafast control of charge density waves via phase competition
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915687788707840 |
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| author | Ning, Honglie Oh, Kyoung Hun Su, Yifan Shi, Zhengyan Darius Wu, Dong Liu, Qiaomei Lv, B. Q. Zong, Alfred Kang, Gyeongbo Choi, Hyeongi Kim, Hyun-Woo J. Ha, Seunghyeok Kim, Jaehwon Sarker, Suchismita Ruff, Jacob P. C. Kim, B. J. Wang, N. L. Senthil, Todadri Jang, Hoyoung Gedik, Nuh |
| author_facet | Ning, Honglie Oh, Kyoung Hun Su, Yifan Shi, Zhengyan Darius Wu, Dong Liu, Qiaomei Lv, B. Q. Zong, Alfred Kang, Gyeongbo Choi, Hyeongi Kim, Hyun-Woo J. Ha, Seunghyeok Kim, Jaehwon Sarker, Suchismita Ruff, Jacob P. C. Kim, B. J. Wang, N. L. Senthil, Todadri Jang, Hoyoung Gedik, Nuh |
| contents | The intricate competition between coexisting charge density waves (CDWs) can lead to rich phenomena, offering unique opportunities for phase manipulation through electromagnetic stimuli. Leveraging time-resolved X-ray diffraction, we demonstrate ultrafast control of a CDW in EuTe$_4$ upon optical excitation. At low excitation intensities, the amplitude of one of the coexisting CDW orders increases at the expense of the competing CDW, whereas at high intensities, it exhibits a nonmonotonic temporal evolution characterized by both enhancement and reduction. This transient bidirectional controllability, tunable by adjusting photo-excitation intensity, arises from the interplay between optical quenching and phase-competition-induced enhancement. Our findings, supported by phenomenological time-dependent Ginzburg-Landau theory simulations, not only clarify the relationship between the two CDWs in EuTe$_4$, but also highlight the versatility of optical control over order parameters enabled by phase competition. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_00204 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Bidirectional ultrafast control of charge density waves via phase competition Ning, Honglie Oh, Kyoung Hun Su, Yifan Shi, Zhengyan Darius Wu, Dong Liu, Qiaomei Lv, B. Q. Zong, Alfred Kang, Gyeongbo Choi, Hyeongi Kim, Hyun-Woo J. Ha, Seunghyeok Kim, Jaehwon Sarker, Suchismita Ruff, Jacob P. C. Kim, B. J. Wang, N. L. Senthil, Todadri Jang, Hoyoung Gedik, Nuh Strongly Correlated Electrons The intricate competition between coexisting charge density waves (CDWs) can lead to rich phenomena, offering unique opportunities for phase manipulation through electromagnetic stimuli. Leveraging time-resolved X-ray diffraction, we demonstrate ultrafast control of a CDW in EuTe$_4$ upon optical excitation. At low excitation intensities, the amplitude of one of the coexisting CDW orders increases at the expense of the competing CDW, whereas at high intensities, it exhibits a nonmonotonic temporal evolution characterized by both enhancement and reduction. This transient bidirectional controllability, tunable by adjusting photo-excitation intensity, arises from the interplay between optical quenching and phase-competition-induced enhancement. Our findings, supported by phenomenological time-dependent Ginzburg-Landau theory simulations, not only clarify the relationship between the two CDWs in EuTe$_4$, but also highlight the versatility of optical control over order parameters enabled by phase competition. |
| title | Bidirectional ultrafast control of charge density waves via phase competition |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2510.00204 |