Anderson localizaion for semi-Dirac semi-Weyl semi-metal

The semi-Dirac semi-Weyl semi-metal has been of interest in recent years due to its naturally occurring point Fermi surface and the associated exotic band-structure near the Fermi surface, which is linear (graphene-like) in one direction of the Brillouin zone, but quadratic in a direction perpendicu...

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Bibliographic Details
Published inarXiv.org
Main Author Banerjee, Swapnonil
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.08.2015
Subjects
Adatoms
Brillouin zones
Conduction electrons
Fermi surfaces
Graphene
Impurities
Magnetism
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Summary:The semi-Dirac semi-Weyl semi-metal has been of interest in recent years due to its naturally occurring point Fermi surface and the associated exotic band-structure near the Fermi surface, which is linear (graphene-like) in one direction of the Brillouin zone, but quadratic in a direction perpendicular to it. In this paper the effect of a magnetic adatom impurity in a semi-Dirac system is studied. As in a metal, the magnetic impurity in a semi-Dirac system interacts with the sea of conduction electrons and gives rise to magnetism. The transition of the semi-Dirac system from the non-magnetic to the magnetic phase is studied as a function of the impurity energy, the strength of hybridization between the impurity and the bath as well as that of the electron electron interaction at the impurity atom. The results are compared and contrasted with those of graphene and ordinary metal. Since the semi-Dirac and the Dirac dispersion share similar features,e.g, both are particle hole symmetric and linear in one direction, the two systems share resemblances in their characteristics in the presence of a magnetic impurity. But some features are unique to the semi-Dirac dispersion.
ISSN:2331-8422