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• W3021570506 abstract "The electronic properties of single-layer antimony are studied by a combination of first-principles and tight-binding methods. The band structure obtained from relativistic density functional theory is used to derive an analytic tight-binding model that offers an efficient and accurate description of single-particle electronic states in a wide spectral region up to the mid-UV. The strong ($lambda=0.34$ eV) intra-atomic spin-orbit interaction plays a fundamental role in the band structure, leading to splitting of the valence band edge and to a significant reduction of the effective mass of the hole carriers. To obtain an effective many-body model of two-dimensional Sb we calculate the screened Coulomb interaction and provide numerical values for the on-site $bar{V}_{00}$ (Hubbard) and intersite $bar{V}_{ij}$ interactions. We find that the screening effects originate predominantly from the 5$p$ states, and are thus fully captured within the proposed tight-binding model. The leading kinetic and Coulomb energies are shown to be comparable in magnitude, $|t_{01}|/(bar{V}_{00}-bar{V}_{01}) sim 1.6$, which suggests a strongly correlated character of 5$p$ electrons in Sb. The results presented here provide an essential step toward the understanding and rational description of a variety of electronic properties of this two-dimensional material." @default.
• W3021570506 created "2020-05-13" @default.
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• W3021570506 date "2017-02-22" @default.
• W3021570506 modified "2023-09-26" @default.
• W3021570506 title "Electronic properties of single-layer antimony: Tight-binding model, spin-orbit coupling, and the strength of effective Coulomb interactions" @default.
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• W3021570506 doi "https://doi.org/10.1103/physrevb.95.081407" @default.
• W3021570506 hasPublicationYear "2017" @default.
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