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- W1964147830 abstract "A new material – the monolayered, π-conjugated, poly dinitrogen-linked 1,5-dihydro-1,5-diazocine – is proposed. Density functional theory calculations reveal that the material is a two-dimensional Dirac insulator with a direct band gap. The generalised gradient approximation (GGA) and the local density approximation (LDA) give band gaps of E gap GGA = 0.045 eV and E gap LDA = 0.035 eV. Anisotropy of the Dirac cones results in variation of Fermi velocities of the charge carriers: [0.85–5.30] × 106 m/s (GGA) and [0.86–5.38] × 106 m/s (LDA). Corresponding effective masses are ∼103 lower than that of a free electron. G0W0 calculations confirm the topology of density functional theory band structure and show band gap of E gap = 0.121 eV. Cohesive energies are estimated at E c GGA = 5.30 eV/atom and E c LDA = 6.15 eV/atom. Thus, the results provide the first evidence for the existence of Dirac insulators among organic polymers." @default.
- W1964147830 created "2016-06-24" @default.
- W1964147830 creator A5011201234 @default.
- W1964147830 date "2012-09-01" @default.
- W1964147830 modified "2023-09-26" @default.
- W1964147830 title "Poly –N = N– linked 1,5-dihydro-1,5-diazocine, the two-dimensional polymer with<i>Dirac insulator</i>properties:<i>ab initio</i>study" @default.
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- W1964147830 doi "https://doi.org/10.1080/08927022.2012.666798" @default.
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