Stability of electronical properties of Antimony antidot nanostructure in the presence and in the absence of substrate

Abstract

Using the multi-orbital (sp3) tight-binding (TB) model, we have obtained the band structure of the Antimony monolayer with a hexagonal array of holes. These structures are named Antimony antidot lattice (AAL). In our tight-binding model, the interaction of the nearest and next-nearest neighbors of atoms has been considered. Our numerical results present that band structures of the system depend on the size of embedded holes in the Antimony monolayer as points of the antidot lattice. Also, we have shown that AALs with a large radius of holes are almost conductors with tiny energy gaps. Besides, we have represented that spin–orbit coupling magnificently affects the band gap for Antimony antidot lattice in the different ranges of hole radius. Moreover, we have investigated the effect of distance between holes of AALs on the band structure and energy gap. Also, the variations of the band gap of Antimony antidot by changing the inserted strain on it have been investigated. Furthermore taking into account the effect of strain, we have compared the band structure and energy gap of antidot lattice (Highlightslayer with hole) and ideal sheet (monolayer without hole).Finally, the effect of substrate on the electronical properties of Antimony monolayer with holes (Antidot) and without holes (ideal sheet) is analyzed.