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DFT-based tight-binding model of vdW bilayer χ3 and β12 borophene

Abbasi, R ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matchemphys.2023.128136
  3. Publisher: Elsevier Ltd , 2023
  4. Abstract:
  5. In this work, a tight-binding (TB) model with the Slater–Koster (SK) approximation is presented to describe the electronic properties of vdW bilayer χ3 and β12 borophene with AA stack. This model is created by using four orbitals of S, Px, Py, and Pz for each boron atom. By fitting the results of the TB model and density functional theory (DFT) calculations using the least-squares method and the Levenberg-Marquardt nonlinear fitting algorithm, the optimal Hamiltonian and the overlap matrix are calculated. This TB model well describes energy bands around high-symmetry k-points, by considering three nearest neighbors in each layer and a non-orthogonal basis set. © 2023 Elsevier B.V
  6. Keywords:
  7. Band structure ; Density of states ; Tight-binding model ; vdW bilayer borophene
  8. Source: Materials Chemistry and Physics ; Volume 307 , 2023 ; 02540584 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0254058423008441