Orbital Crossing with Spin Flip Found in Noncentrosymmetric Metals

Abstract

In noncentrosymmetric metals, the antisymmetric spin orbit interaction resolves spin degeneracy of electronic bands and therefore a Fermi surface splits into two pieces. In the metals belonging to a certain point group, however, the spin degeneracy recovers at the special symmetry points. Here, we found the orbital crossing phenomenon in which a carrier transfers from one split Fermi surface to the other one at a degenerate point. We further estimated the probability of crossing the orbital and revealed that the estimation allows us to judge the occurrence of spin flip at the degenerate point.