A First-principles Study of Weyl Nodal Loop and Multiple Sets of Weyl Points in Trigonal PtBi 2
Researchers used first-principles calculations to map topological features in trigonal PtBi2, focusing on Weyl nodal loops and multiple sets of Weyl points. They found that while some features are robust against structural changes, others are highly sensitive to the Bi-layer buckling magnitude. This detailed mapping helps explain experimental observations of surface superconductivity and Fermi arcs.