Atomic-scale visualization of chiral charge density wave superlattices and their reversible switching

Xuan Song, Liwei Liu (), Yaoyao Chen, Han Yang, Zeping Huang, Baofei Hou, Yanhui Hou, Xu Han, Huixia Yang, Quanzhen Zhang, Teng Zhang, Jiadong Zhou, Yuan Huang, Yu Zhang, Hong-Jun Gao and Yeliang Wang ()
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Xuan Song: Beijing Institute of Technology
Liwei Liu: Beijing Institute of Technology
Yaoyao Chen: Beijing Institute of Technology
Han Yang: Beijing Institute of Technology
Zeping Huang: Beijing Institute of Technology
Baofei Hou: Beijing Institute of Technology
Yanhui Hou: Beijing Institute of Technology
Xu Han: Beijing Institute of Technology
Huixia Yang: Beijing Institute of Technology
Quanzhen Zhang: Beijing Institute of Technology
Teng Zhang: Beijing Institute of Technology
Jiadong Zhou: Beijing Institute of Technology
Yuan Huang: Beijing Institute of Technology
Yu Zhang: Beijing Institute of Technology
Hong-Jun Gao: Chinese Academy of Sciences
Yeliang Wang: Beijing Institute of Technology

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract Chirality is essential for various phenomena in life and matter. However, chirality and its switching in electronic superlattices, such as charge density wave (CDW) superlattices, remain elusive. In this study, we characterize the chirality switching with atom-resolution imaging in a single-layer NbSe2 CDW superlattice by the technique of scanning tunneling microscopy. The atomic arrangement of the CDW superlattice is found continuous and intact although its chirality is switched. Several intermediate states are tracked by time-resolved imaging, revealing the fast and dynamic chirality transition. Importantly, the switching is reversibly realized with an external electric field. Our findings unveil the delicate switching process of chiral CDW superlattice in a two-dimensional (2D) crystal down to the atomic scale.

Date: 2022
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Citations: View citations in EconPapers (3)

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DOI: 10.1038/s41467-022-29548-2

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