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Ab Initio Calculations of SrTiO3 (111) Surfaces

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Abstract

The paper presents the results of calculations of SrTiO3 polar (111) surface relaxations and energetics using the ab initio code CRYSTAL and a hybrid description of exchange and correlation. Using a hybrid B3LYP approach, the surface relaxation has been calculated for the two possible Ti and SrO 3 SrTiO3 (111) surface terminations. For both Ti and SrO3-terminated SrTiO3 (111) surfaces upper layer atoms, with the sole exception of SrO3-terminated surface Sr atom, relax inwards. The calculated surface relaxation energy for Ti-terminated SrTiO 3 (111) surface is almost five times larger, than the surface relaxation energy for SrO3-terminated SrTiO3 (111) surface. The surface energy for Ti-terminated SrTiO3 (111) surface (4.99 eV) is smaller, than the surface energy for SrO3-terminated SrTiO3 (111) surface (6.30 eV).

Original languageEnglish
Title of host publicationNanodevices and Nanomaterials for Ecological Security
EditorsYuri Shunin, Arnold Kiv
PublisherSpringer
Pages125-132
Number of pages8
ISBN (Print)9789400741188
DOIs
Publication statusPublished - 2012

Publication series

NameNATO Science for Peace and Security Series B: Physics and Biophysics
ISSN (Print)1874-6500

OECD Field of Science

  • 1.3 Physical Sciences

Keywords

  • (111) surface
  • Ab initio calculations
  • B3LYP
  • SrTiO

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