Predicting band gaps and band-edge positions of oxide perovskites using density functional theory and machine learning
Journal Article
·
· Physical Review. B
- Univ. of Delaware, Newark, DE (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Connecticut, Storrs, CT (United States)
- Univ. of Delaware, Newark, DE (United States)
- Univ. of Delaware, Newark, DE (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Density functional theory (DFT) within the local or semilocal density approximations, i.e., the local density approximation (LDA) or generalized gradient approximation (GGA), has become a workhorse in the electronic structure theory of solids, being extremely fast and reliable for energetics and structural properties, yet remaining highly inaccurate for predicting band gaps of semiconductors and insulators. The accurate prediction of band gaps using first-principles methods is time consuming, requiring hybrid functionals, quasiparticle GW, or quantum Monte Carlo methods. Efficiently correcting DFT-LDA/GGA band gaps and unveiling the main chemical and structural factors involved in this correction is desirable for discovering novel materials in high-throughput calculations. In this direction, we, in this study, use DFT and machine learning techniques to correct band gaps and band-edge positions of a representative subset of ABO3 perovskite oxides. Relying on the results of HSE06 hybrid functional calculations as target values of band gaps, we find a systematic band-gap correction of ~1.5 eV for this class of materials, where ~1 eV comes from downward shifting the valence band and ~0.5 eV from uplifting the conduction band. The main chemical and structural factors determining the band-gap correction are determined through a feature selection procedure.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1898360
- Report Number(s):
- LA-UR-22-23146
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 15 Vol. 106; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Formation energy puzzle in intermetallic alloys: Random phase approximation fails to predict accurate formation energies
Opening band gaps of low-dimensional materials at the meta-GGA level of density functional approximations
Journal Article
·
Sat Oct 31 20:00:00 EDT 2020
· Physical Review. B
·
OSTI ID:1851699
Opening band gaps of low-dimensional materials at the meta-GGA level of density functional approximations
Journal Article
·
Sun Jun 20 20:00:00 EDT 2021
· Physical Review Materials
·
OSTI ID:1853746