Interplay between magnetism and band topology in the kagome magnets RMn6Sn6

Magneto-optic Kerr Effect Measurement of TbMn6Sn6 at mK Temperature

“…TbMn6Sn6 is attracting tremendous attention for its pure manganese Kagome lattice which can host flat bands and topologically non-trivial Dirac cones at 𝐾 and 𝐾 ′ points of its hexagonal Brillouin zone. [12][13][14][15][16][17][18][19] In magnetic materials, the structure of these topological bands leads to a variety of exotic phenomena such as large anomalous Hall effect and Nernst effect that are closely related to Berry curvature near Fermi surface. TbMn6Sn6 is one of the 𝑅Mn6Sn6 (𝑅 = rare earth, Sc, Y, Gd-Tm, Lu) family, where the rare earth atoms' hexagonal planes (H) and manganese Kagome planes (K) stack alternatively to form K-H-K-K-H-K structure with tin layers in between them.…”