Effect of XC functionals and dispersion corrections on the DFT‐computed structural and vibrational properties of SrCl2–NaCl and ZrF4–LiF
Journal Article
·
· Journal of Raman Spectroscopy
- Univ. of South Carolina, Columbia, SC (United States)
Density functional theory (DFT) calculations were performed to examine the impact of exchange–correlation (XC) functionals and van der Waals corrections (specifically the D3 method) on the structural and vibrational properties of the SrCl2–NaCl and ZrF4–LiF salt systems. Multiple XC functionals, including the local density approximation (LDA), the generalized gradient approximation using the Perdew–Burke–Ernzerhof (PBE) model, and its modified form suitable for solids (PBEsol), the dispersion-corrected PBE-D3 and PBEsol-D3, were considered. Of these functionals, LDA was found to exhibit the highest degree of error, while PBEsol and PBE-D3 displayed the least error. Underestimated lattice parameters compared with experimental values were observed to result in higher force constants, leading to an overprediction of vibrational frequencies. Conversely, an overestimation of lattice parameters was associated with lower vibrational frequencies. The methodology presented in this study yielded results that are in good agreement with experiment, irrespective of the method (finite differences vs. density functional perturbation theory) employed for calculating infrared and Raman spectra. It was further demonstrated that for alkali halides with weak Raman scattering, utilizing a supercell constructed from primitive cells better predicts Raman features than does the use of conventional cells.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP)
- Grant/Contract Number:
- NA0003525; NE0008772
- OSTI ID:
- 2589263
- Journal Information:
- Journal of Raman Spectroscopy, Journal Name: Journal of Raman Spectroscopy Journal Issue: 7 Vol. 55; ISSN 0377-0486; ISSN 1097-4555
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
First-principles calculations of the electronic and structural properties of GaSb
Quasiharmonic calculations of thermodynamic properties for La3-xTe4 system
Rethinking CO adsorption on transition-metal surfaces: Effect of density-driven self-interaction errors
Journal Article
·
Sat Oct 15 00:00:00 EDT 2016
· Semiconductors
·
OSTI ID:22649696
Quasiharmonic calculations of thermodynamic properties for La3-xTe4 system
Journal Article
·
Wed Jan 31 19:00:00 EST 2018
· Computational Materials Science
·
OSTI ID:1462704
Rethinking CO adsorption on transition-metal surfaces: Effect of density-driven self-interaction errors
Journal Article
·
Sun Jul 28 20:00:00 EDT 2019
· Physical Review B
·
OSTI ID:1611875