Sub-7-femtosecond conical-intersection dynamics probed at the carbon K-edge

KS Zinchenko, F Ardana-Lamas, I Seidu, SP Neville… - Science, 2021 - science.org
Conical intersections allow electronically excited molecules to return to their electronic
ground state. Here, we observe the fastest electronic relaxation dynamics measured to date …

Highly accurate prediction of core spectra of molecules at density functional theory cost: Attaining sub-electronvolt error from a restricted open-shell Kohn–Sham …

D Hait, M Head-Gordon - The journal of physical chemistry letters, 2020 - ACS Publications
We present the use of the recently developed square gradient minimization (SGM) algorithm
for excited-state orbital optimization to obtain spin-pure restricted open-shell Kohn–Sham …

Core-excited states and x-ray absorption spectra from multireference algebraic diagrammatic construction theory

IM Mazin, AY Sokolov - Journal of Chemical Theory and …, 2023 - ACS Publications
We report the development and benchmark of multireference algebraic diagrammatic
construction theory (MR-ADC) for the simulations of core-excited states and X-ray absorption …

Electron-affinity time-dependent density functional theory: Formalism and applications to core-excited states

K Carter-Fenk, LA Cunha… - The Journal of …, 2022 - ACS Publications
The lack of particle–hole attraction and orbital relaxation within time-dependent density
functional theory (TDDFT) lead to extreme errors in the prediction of K-edge X-ray …

XABOOM: An X-ray absorption benchmark of organic molecules based on carbon, nitrogen, and oxygen 1s→ π* transitions

T Fransson, IE Brumboiu, ML Vidal… - Journal of Chemical …, 2021 - ACS Publications
The performance of several standard and popular approaches for calculating X-ray
absorption spectra at the carbon, nitrogen, and oxygen K-edges of 40 primarily organic …

A DFT/MRCI Hamiltonian parameterized using only ab initio data: I. valence excited states

TS Costain, V Ogden, SP Neville… - The Journal of Chemical …, 2024 - pubs.aip.org
A new combined density functional theory and multi-reference configuration interaction
(DFT/MRCI) Hamiltonian parameterized solely using the benchmark ab initio vertical …

Relativistic EOM-CCSD for core-excited and core-ionized state energies based on the four-component Dirac–Coulomb (− Gaunt) Hamiltonian

L Halbert, ML Vidal, A Shee, S Coriani… - Journal of Chemical …, 2021 - ACS Publications
We report an implementation of the core–valence separation approach to the four-
component relativistic Hamiltonian-based equation-of-motion coupled-cluster with singles …

[HTML][HTML] Robust relativistic many-body Green's function based approaches for assessing core ionized and excited states

M Kehry, W Klopper, C Holzer - The Journal of Chemical Physics, 2023 - pubs.aip.org
A two-component contour deformation (CD) based GW method that employs frequency
sampling to drastically reduce the computational effort when assessing quasiparticle states …

Tuning UV Pump X-ray Probe Spectroscopy on the Nitrogen K Edge Reveals the Radiationless Relaxation of Pyrazine: Ab Initio Simulations Using the Quasiclassical …

T Kaczun, AL Dempwolff, X Huang… - The Journal of …, 2023 - ACS Publications
Transient absorption UV pump X-ray probe spectroscopy has been established as a
versatile technique for the exploration of ultrafast photoinduced dynamics in valence-excited …

Simulating X-ray photoelectron spectra with strong electron correlation using multireference algebraic diagrammatic construction theory

CEV de Moura, AY Sokolov - Physical Chemistry Chemical Physics, 2022 - pubs.rsc.org
We present a new theoretical approach for the simulations of X-ray photoelectron spectra of
strongly correlated molecular systems that combines multireference algebraic diagrammatic …