Quadratic Band Touching and Nontrivial Winding Reveal Generalized Angular Momentum ConservationRemoveYihan Wang, Domenico Bongiovanni, Dario Jukić, Sihong Lei, Zhichan Hu, Daohong Song, Jingjun Xu, Roberto Morandotti, Hrvoje Buljan, and Zhigang ChenPhys. Rev. Lett. 137, 023803 (2026)
