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- W2890718003 abstract "Bilayer hexagonal borophene, which is bound together through pillars, is a novel topological semimetal. Using density functional theory, we investigate its electronic band structure and show that it is a Dirac material which exhibits a nodal line. A tight-binding model was constructed based on the Slater-Koster approach, which accurately models the electronic spectrum. We constructed an effective four-band model Hamiltonian to describe the spectrum near the nodal line. This Hamiltonian can be used as a new platform to study the new properties of nodal line semimetals. We found that the nodal line is created by edge states and is very robust against perturbations and impurities. Breaking symmetries can split the nodal line, but cannot open a gap." @default.
- W2890718003 created "2018-09-27" @default.
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- W2890718003 date "2018-09-06" @default.
- W2890718003 modified "2023-10-16" @default.
- W2890718003 title "Dirac nodal line in bilayer borophene: Tight-binding model and low-energy effective Hamiltonian" @default.
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- W2890718003 doi "https://doi.org/10.1103/physrevb.98.115413" @default.
- W2890718003 hasPublicationYear "2018" @default.
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