Predicting the energetics of defects at T>0 K

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Abstract

The first-principles theory of defects in semiconductors is very good at predicting most ground state properties of defects in periodic supercells at T=0K. Even though the total zero-point energy is ignored, these calculations lead to reliable geometries, energetics, densities, and local vibrational modes. However, much of the real world operates around room temperature, samples are annealed or exposed to various sources of energy which, ultimately, raise the temperature of the crystal. In this paper, we extend first-principles theory to finite temperatures by calculating explicitly the various contributions to the free energy (at constant volume). The emphasis in this paper is on the temperature and sample dependence of binding free energies.

Original languageEnglish
Pages (from-to)940-944
Number of pages5
JournalPhysica B: Condensed Matter
Volume376-377
Issue number1
DOIs
StatePublished - Apr 1 2006
EventProceedings of the 23rd International Conference on Defects in Semiconductors -
Duration: Jul 24 2005Jul 29 2005

Keywords

  • Entropy
  • Free energy
  • Theory

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