Excitons in metal-halide perovskites from first-principles many-body perturbation theory

L Leppert - The Journal of chemical physics, 2024 - pubs.aip.org
Metal-halide perovskites are a structurally, chemically, and electronically diverse class of
semiconductors with applications ranging from photovoltaics to radiation detectors and …

Meta-generalized gradient approximations in time dependent generalized Kohn–Sham theory: Importance of the current density correction

R Richter, T Aschebrock, I Schelter… - The Journal of Chemical …, 2023 - pubs.aip.org
We revisit the use of Meta-Generalized Gradient Approximations (mGGAs) in time-
dependent density functional theory, reviewing conceptual questions and solving the …

Nonempirical prediction of the length-dependent ionization potential in molecular chains

G Ohad, M Hartstein, T Gould, JB Neaton… - Journal of Chemical …, 2024 - ACS Publications
The ionization potential of molecular chains is well-known to be a tunable nanoscale
property that exhibits clear quantum confinement effects. State-of-the-art methods can …

[HTML][HTML] Origin of the success of mGGAs for bandgaps

P Kovács, P Blaha, GKH Madsen - The Journal of Chemical Physics, 2023 - pubs.aip.org
One of the well-known limitations of Kohn–Sham density functional theory is the tendency to
strongly underestimate bandgaps. Meta-generalized gradient approximations (mGGAs) …

[HTML][HTML] Exact exchange-like electric response from a meta-generalized gradient approximation: A semilocal realization of ultranonlocality

T Aschebrock, T Lebeda, M Brütting… - The Journal of …, 2023 - pubs.aip.org
We review the concept of ultranonlocality in density functional theory and the relation
between ultranonlocality, the derivative discontinuity of the exchange energy, and the static …

[HTML][HTML] Current density functional framework for spin–orbit coupling: Extension to periodic systems

YJ Franzke, C Holzer - The Journal of Chemical Physics, 2024 - pubs.aip.org
Spin–orbit coupling induces a current density in the ground state, which consequently
requires a generalization for meta-generalized gradient approximations. That is, the …

Accurate and efficient prediction of the band gaps and optical spectra of chalcopyrite semiconductors from a nonempirical range-separated dielectric-dependent …

A Ghosh, S Jana, D Rani, M Hossain, MK Niranjan… - Physical Review B, 2024 - APS
The accurate prediction of electronic and optical properties in chalcopyrite semiconductors
has been a persistent challenge for density-functional-theory (DFT)-based approaches …

Balancing the Contributions to the Gradient Expansion: Accurate Binding and Band Gaps with a Nonempirical Meta-GGA

T Lebeda, T Aschebrock, S Kümmel - Physical Review Letters, 2024 - APS
The gradient expansion has been a long-standing guide rail in density-functional theory. We
here demonstrate that for exchange-correlation approximations that depend on the gradient …

Identifying Practical DFT Functionals for Predicting 0D and 1D Organic Metal-Halide Hybrids

Y He, MS Islam, J Viera, H Gao, J Sun… - The Journal of …, 2024 - ACS Publications
Low-dimensional organic metal-halide hybrids (LD-OMHHs) are a promising class of
materials for applications in optical, magnetic, and quantum information technologies …

Combining Local Range Separation and Local Hybrids: A Step in the Quest for Obtaining Good Energies and Eigenvalues from One Functional

M Brütting, H Bahmann… - The Journal of Physical …, 2024 - ACS Publications
Some of the most successful exchange–correlation approximations in density functional
theory are “hybrids”, ie, they rely on combining semilocal density functionals with exact …