Semimetal with both Rarita-Schwinger-Weyl and Weyl excitations
Semimetal with both Rarita-Schwinger-Weyl and Weyl excitations
We propose a relativistic Jeff=3/2 semimetal with 4d1 or 5d1 electrons on a cubic lattice when the strong spin-orbital coupling takes over the Hunds' coupling. A relativistic spinor with spin 3/2 is historically called Rarita-Schwinger spinor. In the massless case, the right- and left-handed chiral degrees of freedom of the …