Quantum geometry in the ${\mathrm{NbSe}}_{2}$ family: Obstructed compact Wannier function and perturbation theory
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论文直接以NbSe2及相关材料的量子几何为核心，构造紧致阻挫Wannier模型并讨论其对电荷序、电子-声子耦合和超导的影响；摘要未涉及非线性光学或Hall响应。
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Author(s): Jiabin Yu, Yi Jiang, Yuanfeng Xu, Dumitru Călugăru, Haoyu Hu, Haojie Guo, Sandra Sajan, Yongsong Wang, Miguel M. Ugeda, Fernando De Juan, and B. Andrei Bernevig Here, the authors reveal that monolayer NbSe 2 and related transition metal dichalcogenides host obstructed atomic bands near the Fermi level. By constructing a b i n i t i o six-, three-, and single-band Wannier models, they identify remarkably compact obstructed Wannier functions and an unusual dominance of next-nearest-neighbor hopping. These results provide a transparent low-energy framework for investigating how quantum geometry shapes charge order, electron–phonon coupling, and superconductivity in NbSe 2 . [Phys. Rev. B 114, 125104] Published Fri Aug 07, 2026