876 research outputs found
Spin-Orbit Interaction Effects in the Electronic Structure of B20-type CoSi: First-Principles Density Functional Study
We have performed fully relativistic first-principles density functional
calculations for non-magnetic B20-type CoSi. The spin-orbit interaction has
crucial effects on the electronic structures of a chiral crystal. The
calculated band structure around the Fermi energy shows Bloch vector -linear
dispersion expressed by a - Weyl Hamiltonian, i.e., a mass-less
Dirac Hamiltonian. We found the hedgehog-like spin texture in Bloch
-vector space (momentum space) on the isoenergy surface around
the point. The Fermi velocity for -linear dispersion is about
0.22, where is the Fermi velocity of graphene.Comment: 6 pages, SCES 2013, accepted for publication in JPS Conf. Pro
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