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Why the Heyd-Scuseria-Ernzerhof hybrid functional description of VO2 phases is not correct

Ricardo Grau-Crespo, Hao Wang, and Udo Schwingenschlögl
Phys. Rev. B 86, 081101(R) – Published 6 August 2012

Abstract

In contrast with recent claims that the Heyd-Scuseria-Ernzerhof (HSE) screened hybrid functional can provide a good description of the electronic and magnetic structures of VO2 phases [Eyert, Phys. Rev. Lett. 107, 016401 (2011)], we show here that the HSE lowest-energy solutions for both the low-temperature monoclinic (M1) phase and the high-temperature rutile (R) phase, which are obtained upon inclusion of spin polarization, are at odds with experimental observations. For the M1 phase the ground state is (but should not be) magnetic, while the ground state of the R phase, which is also spin polarized, is not (but should be) metallic. The energy difference between the low-temperature and high-temperature phases has strong discrepancies with the experimental latent heat.

  • Figure
  • Figure
  • Received 12 December 2011

DOI:https://doi.org/10.1103/PhysRevB.86.081101

©2012 American Physical Society

Authors & Affiliations

Ricardo Grau-Crespo*

  • Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK

Hao Wang and Udo Schwingenschlögl

  • KAUST, PSE Division, Thuwal 23955-6900, Kingdom of Saudi Arabia

  • *r.grau-crespo@ucl.ac.uk
  • udo.schwingenschlogl@kaust.edu.sa

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Issue

Vol. 86, Iss. 8 — 15 August 2012

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