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- W2677037690 endingPage "454004" @default.
- W2677037690 startingPage "454004" @default.
- W2677037690 abstract "In this paper we assess the predictive power of the self-consistent hybrid functional scPBE0 in calculating the band gap of oxide semiconductors. The computational procedure is based on the self-consistent evaluation of the mixing parameter α by means of an iterative calculation of the static dielectric constant using the perturbation expansion after discretization method and making use of the relation . Our materials dataset is formed by 30 compounds covering a wide range of band gaps and dielectric properties, and includes materials with a wide spectrum of applications such as thermoelectrics, photocatalysis, photovoltaics, transparent conducting oxides, and refractory materials. Our results show that the scPBE0 functional provides better band gaps than the non self-consistent hybrids PBE0 and HSE06, but scPBE0 does not show significant improvement on the description of the static dielectric constants. Overall, the scPBE0 data exhibit a mean absolute percentage error of 14% (band gaps) and 10% (). For materials with weak dielectric screening and large excitonic biding energies scPBE0, unlike PBE0 and HSE06, overestimates the band gaps, but the value of the gap becomes very close to the experimental value when excitonic effects are included (e.g. for SiO2). However, special caution must be given to the compounds with small band gaps due to the tendency of scPBE0 to overestimate the dielectric constant in the proximity of the metallic limit." @default.
- W2677037690 created "2017-06-30" @default.
- W2677037690 creator A5040456088 @default.
- W2677037690 creator A5059112209 @default.
- W2677037690 date "2017-10-19" @default.
- W2677037690 modified "2023-10-18" @default.
- W2677037690 title "Assessing the performance of self-consistent hybrid functional for band gap calculation in oxide semiconductors" @default.
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