Room-temperature non-volatile optical manipulation of polar order in a charge density wave

Qiaomei Liu, Dong Wu (), Tianyi Wu, Shanshan Han, Yiran Peng, Zhihong Yuan, Yihan Cheng, Bohan Li, Tianchen Hu, Li Yue, Shuxiang Xu, Ruoxuan Ding, Ming Lu, Rongsheng Li, Sijie Zhang, Baiqing Lv, Alfred Zong, Yifan Su, Nuh Gedik, Zhiping Yin, Tao Dong and Nanlin Wang ()
Additional contact information
Qiaomei Liu: Peking University
Dong Wu: Beijing Academy of Quantum Information Sciences
Tianyi Wu: Peking University
Shanshan Han: Beijing Academy of Quantum Information Sciences
Yiran Peng: Beijing Normal University
Zhihong Yuan: Shanxi Normal University
Yihan Cheng: Peking University
Bohan Li: Beijing Academy of Quantum Information Sciences
Tianchen Hu: Peking University
Li Yue: Peking University
Shuxiang Xu: Peking University
Ruoxuan Ding: Peking University
Ming Lu: Beijing Academy of Quantum Information Sciences
Rongsheng Li: Peking University
Sijie Zhang: Peking University
Baiqing Lv: Shanghai Jiao Tong University
Alfred Zong: University of California
Yifan Su: Massachusetts Institute of Technology
Nuh Gedik: Massachusetts Institute of Technology
Zhiping Yin: Beijing Normal University
Tao Dong: Peking University
Nanlin Wang: Peking University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Utilizing ultrafast light-matter interaction to manipulate electronic states of quantum materials is an emerging area of research in condensed matter physics. It has significant implications for the development of future ultrafast electronic devices. However, the ability to induce long-lasting metastable electronic states in a fully reversible manner is a long-standing challenge. Here, by using ultrafast laser excitations, we demonstrate the capability to manipulate the electronic polar states in the charge-density-wave material EuTe4 in a non-volatile manner. The process is completely reversible and is achieved at room temperature with an all-optical approach. Each induced non-volatile state brings about modifications to the electrical resistance and second harmonic generation intensity. The results point to layer-specific phase inversion dynamics by which photoexcitation mediates the stacking polar order of the system. Our findings extend the scope of non-volatile all-optical control of electronic states to ambient conditions, and highlight a distinct role of layer-dependent phase manipulation in quasi-two-dimensional systems with inherent sublayer stacking orders.

Date: 2024
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DOI: 10.1038/s41467-024-53323-0

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