Modeling of the cubic and antiferrodistortive phases of SrTiO3 with screened hybrid density functional theory

Fadwa El-Mellouhi, Edward Brothers, Melissa J. Lucero, Gustavo E. Scuseria

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We have calculated the properties of SrTiO3 (STO) using a wide array of density functionals ranging from standard semilocal functionals to modern range-separated hybrids, combined with several basis sets of varying size and quality. We show how these combinations' predictive ability varies significantly, for both STO's cubic and antiferrodistortive (AFD) phases, with the greatest variation in functional and basis set efficacy seen in modeling the AFD phase. The screened hybrid functionals we utilized predict the structural properties of both phases in very good agreement with experiment, especially if used with large (but still computationally tractable) basis sets. The most accurate results presented in this study, namely, those from HSE06 with a modified def2-TZVP basis set, stand as one of the most accurate modelings of STO to date when compared to the literature; these results agree well with experimental structural and electronic properties as well as providing insight into the band structure alteration during the phase transition.

Original languageEnglish
Article number115122
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number11
DOIs
Publication statusPublished - 20 Sep 2011

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functionals
Density functional theory
Structural properties
density functional theory
Electronic properties
Band structure
Phase transitions
Experiments
electronics
strontium titanium oxide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Modeling of the cubic and antiferrodistortive phases of SrTiO3 with screened hybrid density functional theory. / El-Mellouhi, Fadwa; Brothers, Edward; Lucero, Melissa J.; Scuseria, Gustavo E.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 11, 115122, 20.09.2011.

Research output: Contribution to journalArticle

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