Orthogonal Dirac semimetal on honeycomb lattice and the electron spectral function in orthogonal metallic states
arXiv:1301.5705 · doi:10.1142/S021797921361002X
Abstract
Recently, a concept of orthogonal metal has been introduced to reinterpret the disordered state of slave-spin representation in the Hubbard model as an exotic gapped metallic state. We have extended this concept to study the slave-spin representation of Hubbard model on the honeycomb lattice.[Phys. Rev. B \textbf{86}, 165134 (2012)] It is found that a novel gapped metallic state coined orthogonal Dirac semimetal is identified. Such state corresponds to the disordered phase of slave-spin and has the same thermal-dynamical and transport properties as Dirac semimetal but its singe-particle excitation is gapped. More importantly, for generical orthogonal metallic states, the electron spectral function which may be probed in future angle-resolved photoemission spectroscopy (ARPES) experiments are studied.
arXiv commentPart of this article will be published in Int. J. Mod. Phys. B. The discussion on electron spectral function in orthogonal metallic states are totally new. arXiv admin note: substantial text overlap with arXiv:1205.6064
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