Symmetry-protected four double-Weyl fermions and their topological phase transitions in nonmagnetic crystals

Yun-Yun Bai, Ke-Xin Pang, Yan Gao

Realizing Weyl semimetals (WSMs) with the minimal number of Weyl points (WPs) fundamentally simplifies extracting intrinsic topological responses. While a minimum of four conventio…