Robust kagome electronic structure in the topological quantum magnets XMn₆Sn₆ (X=Dy,Tb,Gd, Y) por Gu, X, Chen, C, Wei, WS, Gao, LL, Liu, JY, Du, X, Pei, D, Zhou, JS, Xu, RZ, Yin, ZX, Zhao, WX, Li, YD, Jozwiak, C, Bostwick, A, Rotenberg, E, Backes, D, Veiga, LSI, Dhesi, S, Hesjedal, T, Van Der Laan, G, Du, HF, Jiang, WJ, Qi, YP, Li, G, Shi, WJ, Liu, ZK, Chen, YL, Yang, LX