Ultrahigh anomalous Nernst thermopower and thermal Hall angle in YbMnBi2

As shown by Fig. 1a, the crystal structure of YbMnBi₂ falls into a tetragonal system, whose space group is P4/nmm. There are two types of Bi atoms: type I forms nearest-neighbors of Mn atoms while type II constitutes an interlayer. The Néel…