Lattice-decoupled rotatable stripe-like charge order within the strange metal phase of 2M-WS2

作者：Kebin Xiao, Yunkai Guo, Daran Fu, Yuqiang Fang, Yating Hu, J.-B. Yan, Yucong Peng, Yuyang Wang, Yongkang Ju, Peizhe Tang, Xiangang Wan, Fuqiang Huang, Qi-Kun Xue, Wei Li · 发表于：arXiv (Cornell University) · 年份：2025 · DOI：10.48550/arxiv.2512.18375 · 研究领域：2D Materials and Applications、Organic and Molecular Conductors Research、Topological Materials and Phenomena

In quantum materials, charge orders typically stabilize in specific crystallographic orientations, though their formation mechanisms may vary. Here, using low-temperature scanning tunneling microscopy (STM), we discover a lattice-decoupled rotatable stripe-like charge order coexisting with superconductivity in 2M-WS2. The charge order manifests five distinct orientations across different sample regions, yet maintains an identical wavelength. This directional decoupling from host lattice challenges existing paradigms. First-principles calculations of phonon spectra and nesting function fail to explain the ordering mechanism. Intriguingly, the transition temperature of the charge orders exhibits spatial variations (21-46 K), coinciding with the temperature range of the recently reported strange metal phase in this material. This correlation suggests that the interplay between strong electronic correlations and electron-phonon coupling must be critically evaluated to elucidate the emergence of this unconventional charge order.