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Journal of Central South University

, Volume 21, Issue 2, pp 500–505 | Cite as

First principles calculation on electronic structure, chemical bonding, elastic and optical properties of novel tungsten triboride

  • Yi-fu Wang (王一夫)
  • Qing-lin Xia (夏庆林)
  • Yan Yu (余燕)
Article

Abstract

The electronic structures, chemical bonding, elastic and optical properties of the novel hP24 phase WB3 were investigated by using density-functional theory (DFT) within generalized gradient approximation (GGA). The calculated energy band structures show that the hP24 phase WB3 is metallic material. The density of state (DOS) and the partial density of state (PDOS) calculations show that the DOS near the Fermi level is mainly from the W 5d and B 2p states. Population analysis suggests that the chemical bonding in hP24-WB3 has predominantly covalent characteristics with mixed covalent-ionic characteristics. Basic physical properties, such as lattice constant, bulk modulus, shear modulus and elastic constants C ij were calculated. The elastic modulus E and Poisson ratio ν were also predicted. The results show that hP24-WB3 phase is mechanically stable and behaves in a brittle manner. Detailed analysis of all optical functions reveals that WB3 is a better dielectric material, and reflectivity spectra show that WB3 can be promised as good coating material in the energy regions of 8.5–11.4 eV and 14.5–15.5 eV.

Key words

hP24-WB3 first principles calculation electronic structure chemical bonding, elastic properties optical properties 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Key Laboratory of High Performance Computing and Stochastic Information Processing of Ministry of Education of China (College of Mathematics and Computer Science, Hunan Normal University)ChangshaChina
  2. 2.School of Physics and ElectronicsCentral South UniversityChangshaChina

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