Evolution of the Chern Gap in Kagome Magnet HoMn₆Sn_6−xGe_x

Abstract

The Chern gap is a unique topological feature that can host non-abelian particles. The Kagome lattice hosts Chern fermions. Upon the inclusion of magnetism, the Kagome system hosts a Chern gap at the K points in the lattice. In this work, the effect of Ge doping on HoMn6Sn6 is investigated. It is seen that with increased doping, a multi-stack Chern gap in formed in HoMn6Sn6−xGex. In addition, the Chern gaps are much more pronounced and disperse more in energy in HoMn6Ge6 then in HoMn6Sn6.

Keywords

• Kagome
• fractional charge
• topological
• magnets