(R=Er, Ho) kagome magnet*

Materials that possess interplays between magnetism, correlation, and band topology often result in various exotic topological phenomena, such as giant anomalous Hall effect, Dirac fermions with large magnetic field tunability, magnetic Weyl semimetal state, and Chern gapped Dirac fermions. Rare earth intermetallic compound, RMn₆Sn₆, is among the most interesting kagome systems to study intrinsic quantum behavior. In this presentation, we will discuss the phase transition, and effect of external stimuli such as temperature, magnetic field, and pressure on magnetic, thermal and transport properties for RMn₆Sn₆ (R=Er, Ho). Compared with HoMn₆Sn₆, ErMn₆Sn₆ shows an anomalously large Hall effect and complex magnetism. In addition, the experimental results show that RMn6Sn6 is extremely sensitive to applied physical pressure. We will compare the magnetic and transport behaviors for Er and Ho-based kagome magnets.