Antimonene with Topological Nontrivial Band Structure on Al(111) Substrate

Abstract: Large-area, high-quality monocrystalline antimonene polygons without alloy layers have been spontaneously synthesized on an Al(111) substrate at room temperature. Experimental measurements and first principles calculations both reveals a Dirac point at the Gamma point near -1.4eV in antimonene on Al(111), confirming that the structure exhibits topologically nontrivial properties. Additionally, a previously unpredicted kagome lattice structure of antimonene has been discovered, leading to a low-dispersion band structure near the Fermi level, which has significant implications for electronic properties and transport characteristics.These findings hold great potential for the next generation of electronic devices due to the material's distinctive electron transport properties and spin characteristics. Furthermore, first-principles calculations are utilized to verify the interaction forces between atoms in the Sb structure.