Spin and electric currents induced by a spin-motive force in two-dimensional Dirac semimetals protected by nonsymmorphic symmetries (1708.06223v1)

Abstract: We theoretically study the spin and charge currents induced by a spin-motive force in a two-dimensional Dirac semimetal protected by nonsymmorphic symmetries. Glide mirror plane symmetry, a nonsymmorphic symmetry, leads to a constraint to the induced current; the spin-motive force acting on out-of-plane spin (in-plane spin) induces the pure spin (charge) current. We calculate the response function to the spin-motive force in linear response theory and find that the conductivity for the pure spin current remains non-zero even if the Fermi energy is crossing the node of linear dispersion. We also find that the dissipationless spin current is induced at the charge neutral point.