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Dirac and Weyl Semimetal in XYBi (X = Ba, Eu; Y = Cu, Ag and Au).


ABSTRACT: Weyl and Dirac semimetals recently stimulate intense research activities due to their novel properties. Combining first-principles calculations and effective model analysis, we predict that nonmagnetic compounds BaYBi (Y = Au, Ag and Cu) are Dirac semimetals. As for the magnetic compound EuYBi, although the time reversal symmetry is broken, their long-range magnetic ordering cannot split the Dirac point into pairs of Weyl points. However, we propose that partially substitute Eu ions by Ba ions will realize the Weyl semimetal.

SUBMITTER: Du Y 

PROVIDER: S-EPMC4585842 | biostudies-other | 2015

REPOSITORIES: biostudies-other

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