Three-dimensional higher-spin Dirac and Weyl dispersions in the strongly isotropic K 4 crystal

@inproceedings{Tsuchiizu2016ThreedimensionalHD,
  title={Three-dimensional higher-spin Dirac and Weyl dispersions in the strongly isotropic K 4 crystal},
  author={Masahisa Tsuchiizu},
  year={2016}
}
We analyze the electronic structure in the three-dimensional (3D) crystal formed by the $s{p}^{2}$ hybridized orbitals (${K}_{4}$ crystal), by the tight-binding approach based on the first-principles calculation. We discover that the bulk Dirac-cone dispersions are realized in the ${K}_{4}$ crystal. In contrast to the graphene, the energy dispersions of the Dirac cones are isotropic in 3D and the pseudospin $S=1$ Dirac cones emerge at the $\mathrm{\ensuremath{\Gamma}}$ and $H$ points of the bcc… CONTINUE READING

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