Half-Metallic Ferromagnetic Weyl Fermions Related to Dynamic Correlations in the Zinc-blende Compound VAs
arxiv(2024)
摘要
The realization of 100% polarized topological Weyl fermions in half-metallic
ferromagnets is of particular importance for fundamental research and
spintronic applications. Here, we theoretically investigate the electronic and
topological properties of the zinc-blende compound VAs, which was deemed as a
half-metallic ferromagnet related to dynamic correlations. Based on the
combination of density functional theory and dynamical mean field theory, we
uncover that the half-metallic ferromagnet VAs exhibit attractive Weyl
semimetallic behaviors with twelve pairs of Weyl points, which are very close
to the Fermi level. Meanwhile, we also investigate the magnetization-dependent
topological properties; the results show that the change of magnetization
directions only slightly affects the positions of Weyl points, which is
attributed to the weak spin-orbital coupling effects. The topological surface
states of VAs projected on semi-infinite (001) and (111) surfaces are
investigated. The Fermi arcs of all Weyl points are clearly visible on the
projected Fermi surfaces. Our findings suggest that VAs is a fully
spin-polarized Weyl semimetal with many-body correlated effects for spintronic
applications.
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