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Title: Assessment of the Tao-Mo nonempirical semilocal density functional in applications to solids and surfaces

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [1]
  1. Temple Univ., Philadelphia, PA (United States); Univ. of Pennsylvania, Philadelphia, PA (United States)
  2. Princeton Univ., NJ (United States)
  3. Univ. of Western Ontario, London, ON (Canada)
  4. Rice Univ., Houston, TX (United States)

Recently, Tao and Mo developed a semilocal exchange-correlation density functional. The exchange part of this functional is derived from a density-matrix expansion corrected to reproduce the fourth-order gradient expansion of the exchange energy in the slowly-varying-density limit, while the correlation part is based on the Tao-Perdew-Staroverov-Scuseria (TPSS) correlation functional, with a modification for the low-density limit. In this work, the Tao-Mo (TM) functional is assessed by computing various properties of solids and jellium surfaces. This includes 22 lattice constants and bulk moduli, 30 band gaps, seven cohesive energies, and jellium surface exchange and correlation energies for the density parameter rs in the range from 2 to 3 bohr. Our calculations show that the TM approximation can yield consistently high accuracy for most properties considered here, with mean absolute errors (MAEs) of 0.025 Å for lattice constants, 7.0 GPa for bulk moduli, 0.08 eV/atom for cohesive energies, and 35 erg / cm2 for surface exchange-correlation energies. The MAE in band gaps is larger than that of TPSS, but slightly smaller than the errors of the local spin-density approximation, Perdew-Burke-Ernzerhof generalized gradient approximation, and revised TPSS. However, band gaps are still underestimated, particularly for large-gap semiconductors, compared to the Heyd-Scuseria-Ernzerhof nonlocal screened hybrid functional.

Research Organization:
Rice Univ., Houston, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0001474; FG02-09ER16053; CHE-1640584
OSTI ID:
1535827
Alternate ID(s):
OSTI ID: 1339183
Journal Information:
Physical Review B, Vol. 95, Issue 3; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

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Cited By (9)

Long-range corrected density functional through the density matrix expansion based semilocal exchange hole journal January 2018
Screened hybrid meta-GGA exchange–correlation functionals for extended systems journal January 2019
Efficient lattice constants and energy bandgaps for condensed systems from a meta-GGA level screened range-separated hybrid functional journal September 2018
Assessing the performance of the Tao-Mo semilocal density functional in the projector-augmented-wave method journal July 2018
Assessing the performance of the recent meta-GGA density functionals for describing the lattice constants, bulk moduli, and cohesive energies of alkali, alkaline-earth, and transition metals journal October 2018
Orbital-free approximations to the kinetic-energy density in exchange-correlation MGGA functionals: Tests on solids journal October 2018
Accurate lattice geometrical parameters and bulk moduli from a semilocal density functional journal September 2018
Local atomic arrangement in LaCuAl 3 and LaAuAl 3 by NMR and density functional theory journal July 2019
Long-range dispersion-corrected density functional for noncovalent interactions journal October 2019