Fig. 1: Crystal and electronic structures of YMn6Sn6.
From: Dirac cone, flat band and saddle point in kagome magnet YMn6Sn6
a Confinement of electron eigenstate induced by destructive interference in kagome lattice with NN hopping. b Tight-binding calculation of band structure of kagome lattice with NN in-plane hopping without SOC, featuring the Dirac cone at the BZ corner K point, a saddle point at BZ boundary M point, and a FB over the whole BZ. c Crystal structure of YMn6Sn6 with space group P6/mmm (No. 191). d 3D and projected BZs of YMn6Sn6 with marked high-symmetry points. e Photoemission intensity plot measured with 138-eV photons at EF ± 10 meV in the kz ~ 0 plane. Hexagonal BZs are marked with red lines. f Magnetization as a function of temperature with zero field-cooling and field-cooling at B = 0.5 T along the [100] direction. Temperature dependence of longitudinal resistivity ρxx and ρzz with zero-field.
