Continuous Ring of Unidirectional Guided Resonances Induced by Isotropic Interband CouplingRemoveZengping Su, Wei Li, Jue Li, Haoye Qin, Yongkang Wang, Wenjing Lv, Mengyao Li, Bo Li, and Qinghua SongPhys. Rev. Lett. 137, 016201 (2026)