Zining Hu

Jul 22, 2024 | link.aps.org | Lei Jin |Chenyao Li |Ying Liu |Zining Hu

The charge-2 (C2) triple point (TP) is a zero-dimensional threefold band degeneracy with a topological charge |C|=2. Different from other types of TP, the C2 TP is expected to have novel physical properties because of its nonzero topological charge. However, the C2 TP is only found in nonmagnetic materials and has not been found in realistic magnetic materials. In this work, we systematically study such fermions in nonmagnetic and ferromagnetic systems.