Gate-tunable chiral spin mode in WSe2/WS2 moiré superlattices · Z. Shan et al.
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Zhexu Shan1,2†, Wenjian Su1,2†, Kenji Watanabe3, Takashi Taniguchi4, Shiyao Zhu1,2,5,6,7, Yuanfeng Xu1,8*, Yanhao Tang1,2* The interplay between many-body and spin-orbit coupling (SOC) effects can lead to previously unobserved phenomena in solids. Chiral spin modes (CSMs) are collective spin excitations that arise from such interplay and connect states with opposite chirality. Here, we report a gate-tunable CSM that occurs between conduction SOC-split minibands in near-0°-twisted WSe2/WS2 bilayers. This mode manifests as a sharp resonance with giant Raman efficiency in the pseudovector-symmetry channel of the Raman spectra. By varying the filling, the CSM transitions from a chiral spin exciton to an excitonic polaron. …
摘自《科学》(Science)2026年10月15日,Z. Shan et al.。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。