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note
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We have used a simple four-point interpolation method. The use of a more elaborate method like the cubic spline method is shown to not influence the final results.
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36
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33646610477
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note
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The reason for not using the same expression as in Ref. 19 is that our expression (15) is more general and provided us with a better stability in the fitting procedure.
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33646610685
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note
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To justify the use of the present expression for F(q), we have also used the function given by Ref. 61 and found that the final QP energies differ by at most 0.02 eV for silicon. Moreover, the F(q) is specific to fcc lattice systems and therefore must be adapted for other systems according to Ref. 62, whereas the function used in this work is independent of crystallographic system. We have also checked if six points are sufficient by performing calculations using a set of 12 points; the resulting QP energies remain unchanged, proving the validity of our choice.
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41
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33646612490
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note
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The imaginary part of the self-energy is a sum of delta functions in the plasmon-pole approximation.
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33646600152
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note
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Notice that the same PAW method is used to compute the Si QP energies both within the RPA and the PP model.
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54
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33646608328
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note
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1c for SiC seems to be largely overestimated by GW calculations. In fact, we join the conclusion of Ref. 44 and claim that the experimental value is certainly less precise. This is confirmed by the fact that our calculation agrees by about 0.08 eV with their data.
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55
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33646608162
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note
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1c transition by more than 0.05 eV.
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61
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33646605819
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Database compiled by D. A. Papaconstantopoulos and co-workers and located at http://manybody.nrl.navy.mil/esdata/database.html (the calculations were performed by the APW method including scalar-relativistic corrections within the LDA).
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62
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33646606578
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note
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For the calculated electronic properties of NaH and KH alkali hydrides we have used 64 k points in the full BZ as well as 200 bands, and a dielectric matrix of size 169 × 169 to achieve well converged results.
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63
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0000513898
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Kunz and Mickish have also reported a band gap for LiH of 6.61 eV compared to a measured value of 4.99 eV [data reported in the paper of S. Baroni et al., Phys. Rev. B 32, 4077 (1985)].
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Baroni, S.1
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