Topological Weyl semimetals in $\mathrm{Bi}$${}_{1-x}$$\mathrm{Sb}$${}_x$ alloys

Abstract

We have investigated the Weyl semimetal (WSM) phases in bismuth antimony ($\mathrm{Bi}$${}_{1-x}$$\mathrm{Sb}$${}_x$) alloys by the combination of atomic composition and arrangement. Via first principles calculations, we have found two WSM states with the Sb concentration of $x=0.5$ and $x=0.83$ with specific inversion symmetry broken elemental arrangement. The Weyl points are close to the Fermi level in both of these two WSM states. Therefore, it has a good opportunity to obtain Weyl points in Bi-Sb alloy. The WSM phase provides a reasonable explanation for the current transport study of BiSb alloy with the violation of Ohm's law [Dongwoo Shin, et al., Nature Materials 16, 1096 (2017)]. This work shows that the topological phases in Bi-Sb alloys depend on both elemental composition and their specific arrangement.

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Cited by in corpus (5)

• Flux Free Single Crystal Growth and Detailed Physical Property Characterization of Bi1-xSbx (x = 0.05, 0.1 and 0.15) Topological Insulator
• Magneto-transport and Berry phase in magnetically doped Bi${}_{0.97-x}$Sb${}_{0.03}$ single crystals
• Circular photocurrent in Weyl semimetals with mirror symmetry
• Ultrafast scattering dynamics of coherent phonons in Bi${}_{1-x}$Sb${}_x$ in the Weyl semimetal phase
• Vacancy-mediated suppression of phase separation in a model two-dimensional surface alloy by the difference of the atomic jump rates