Emergence of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>d</mml:mi></mml:math>-orbital magnetic Dirac fermions in a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Mo</mml:mi><mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> monolayer with squared pentagon structure
Xuanyi Li, Sheng Meng, Jia‐Tao Sun
Abstract
We find that an atomically thin $\mathrm{Mo}{\mathrm{S}}_{2}$ monolayer with squared pentagon structure motifs, distinct from all the conventional $\mathrm{Mo}{\mathrm{S}}_{2}$ monolayers, has unique electronic band structures with Dirac cones comprising $d$ orbitals. The squared pentagon $\mathrm{Mo}{\mathrm{S}}_{2}$ monolayer is an intrinsic ferromagnet with a high Curie temperature and behaves as a half semimetal, which possesses spin-polarized Dirac fermions around the Fermi level. Moreover, when spin-orbit couplings are included, the magnetic Dirac band is gapped, hosting quantized conductance channels. This work provides insights in achieving two-dimensional topological materials with unique atomistic patterns.