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Emergent Quantum Phenomena of a Noncentrosymmetric Charge Density Wave in 1T -Transition Metal Dichalcogenides

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Title
Emergent Quantum Phenomena of a Noncentrosymmetric Charge Density Wave in 1T -Transition Metal Dichalcogenides
Author(s)
Cheong-Eung Ahn; Kyung-Hwan Jin; Young-Jae Choi; Jae Whan Park; Han Woong Yeom; Go, Ara; Kim, Yong Baek; Gil Young Cho
Publication Date
2024-05
Journal
Physical Review Letters, v.132, no.22
Publisher
American Physical Society
Abstract
1T-transition metal dichalcogenides (TMDs) have been an exciting platform for exploring the intertwinement of charge density waves and strong correlation phenomena. While the David star structure has been conventionally considered as the underlying charge order in the literature, recent scanning tunneling probe experiments on several monolayer 1T-TMD materials have motivated a new, alternative structure, namely, the anion-centered David star structure. In this Letter, we show that this novel anion-centered David star structure manifestly breaks inversion symmetry, resulting in flat bands with pronounced Rashba spin-orbit couplings. These distinctive features unlock novel possibilities and functionalities for 1T-TMDs, including the giant spin Hall effect, the emergence of Chern bands, and spin liquid that spontaneously breaks crystalline rotational symmetry. Our findings establish promising avenues for exploring emerging quantum phenomena of monolayer 1T-TMDs with this novel noncentrosymmetric structure. © 2024 American Physical Society.
URI
https://pr.ibs.re.kr/handle/8788114/15244
DOI
10.1103/PhysRevLett.132.226401
ISSN
0031-9007
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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