Nonlocal energy-optimized kernel: Recovering second-order exchange in the homogeneous electron gas
Journal Article
·
· Physical Review B
- Temple Univ., Philadelphia, PA (United States); OSTI
- Temple Univ., Philadelphia, PA (United States)
In order to remedy some of the shortcomings of the random phase approximation (RPA) within adiabatic connection fluctuation-dissipation (ACFD) density functional theory, we introduce a short-ranged, exchange-like kernel that is one-electron self-correlation free and exact for two-electron systems in the high-density limit. By tuning a free parameter in our model to recover an exact limit of the homogeneous electron gas correlation energy, we obtain a nonlocal, energy-optimized kernel that reduces the errors of RPA for both homogeneous and inhomogeneous solids. Using wave-vector symmetrization for the kernel, we also implement RPA renormalized perturbation theory for extended systems, and demonstrate its capability to describe the dominant correlation effects with a low-order expansion in both metallic and nonmetallic systems. Further, the comparison of ACFD structural properties with experiment is also shown to be limited by the choice of norm-conserving pseudopotential.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Complex Materials from First Principles (CCM); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Temple Univ., Philadelphia, PA (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0010499; SC0012575
- OSTI ID:
- 1767452
- Alternate ID(s):
- OSTI ID: 1235640
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 4 Vol. 93; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Self-consistent Kohn-Sham method based on the adiabatic-connection fluctuation-dissipation theorem and the exact-exchange kernel
Adiabatic-connection fluctuation-dissipation DFT for the structural properties of solids—The renormalized ALDA and electron gas kernels
Exploring the Random Phase Approximation for Materials and Chemical Physics
Journal Article
·
Sun Jun 28 00:00:00 EDT 2015
· Journal of Chemical Physics
·
OSTI ID:22490827
Adiabatic-connection fluctuation-dissipation DFT for the structural properties of solids—The renormalized ALDA and electron gas kernels
Journal Article
·
Mon Sep 14 00:00:00 EDT 2015
· Journal of Chemical Physics
·
OSTI ID:22416232
Exploring the Random Phase Approximation for Materials and Chemical Physics
Technical Report
·
Wed Jan 23 23:00:00 EST 2019
·
OSTI ID:1491854