First-principles study of electronic and optical properties of cubic AgTaO3 structure in paraelectric phase at different pressures

Erdinc B., Dede M.

FERROELECTRICS, vol.504, no.1, pp.130-138, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 504 Issue: 1
  • Publication Date: 2016
  • Doi Number: 10.1080/00150193.2016.1240005
  • Journal Name: FERROELECTRICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.130-138
  • Van Yüzüncü Yıl University Affiliated: Yes

Abstract

In the present article, a theoretical study of structural properties, energy band structure, total (TDOS) and partial (PDOS) density of states, real and imaginary parts of photon frequency dependent complex dielectric function of cubic AgTaO3 in paraelectric phase was presented by ab-initio calculations using DFT-LDA in the ABINIT code. The obtained energy band structure under various pressures shows that AgTaO3 has an indirect band gap at the Gamma and M points in the first Brillouin zone which increases by increasing pressure. Calculated results for energy band gap and optical properties under pressure are given and these results were compared with the experimental results and previous calculations.