Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100641114> ?p ?o ?g. }
- W3100641114 abstract "Bi$_2$Se$_3$, a layered three dimensional (3D) material, exhibits topological insulating properties due to presence of surface states and a band gap of 0.3 eV in the bulk. We study the effect hydrostatic pressure $P$ and doping with rare earth elements on the topological aspect of this material in bulk from a first principles perspective. Our study shows that under a moderate pressure of P$>$7.9 GPa, the bulk electronic properties show a transition from an insulating to a Weyl semi-metal state due to band inversion. This electronic topological transition may be correlated to a structural change from a layered van der Waals material to a 3D system observed at $P$=7.9 GPa. At large $P$ density of states have significant value at the Fermi-energy. Intercalating Gd with a small doping fraction between Bi$_2$Se$_3$ layers drives the system to a metallic anti-ferromagnetic state, with Weyl nodes below the Fermi-energy. At the Weyl nodes time reversal symmetry is broken due to finite local field induced by large magnetic moments on Gd atoms. However, substituting Bi with Gd induces anti-ferromagnetic order with an increased direct band gap. Our study provides novel approaches to tune topological transitions, particularly in capturing the elusive Weyl semimetal states, in 3D topological materials." @default.
- W3100641114 created "2020-11-23" @default.
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- W3100641114 date "2021-02-23" @default.
- W3100641114 modified "2023-10-14" @default.
- W3100641114 title "Topological transitions to Weyl states in bulk Bi<sub>2</sub>Se<sub>3</sub>: Effect of hydrostatic pressure and doping" @default.
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- W3100641114 doi "https://doi.org/10.1063/5.0038952" @default.
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