Agglomeration drives the reversed fractionation of aqueous carbonate and bicarbonate at the air–water interface

SW Devlin, S Jamnuch, Q Xu, AA Chen… - Journal of the …, 2023 - ACS Publications
In the course of our investigations of the adsorption of ions to the air–water interface, we
previously reported the surprising result that doubly charged carbonate anions exhibit a …

Nonlocal pseudopotential energy density functional for orbital-free density functional theory

Q Xu, C Ma, W Mi, Y Wang, Y Ma - Nature Communications, 2022 - nature.com
Orbital-free density functional theory (OF-DFT) is an electronic structure method with a low
computational cost that scales linearly with the number of simulated atoms, making it …

Velocity-gauge real-time time-dependent density functional tight-binding for large-scale condensed matter systems

Q Xu, M Del Ben, M Sait Okyay, M Choi… - Journal of Chemical …, 2023 - ACS Publications
We present a new velocity-gauge real-time, time-dependent density functional tight-binding
(VG-rtTDDFTB) implementation in the open-source DFTB+ software package …

Improving Molecular‐Dynamics Simulations for Solid–Liquid Interfaces with Machine‐Learning Interatomic Potentials

P Hou, Y Tian, X Meng - Chemistry–A European Journal, 2024 - Wiley Online Library
Emerging developments in artificial intelligence have opened infinite possibilities for
material simulation. Depending on the powerful fitting of machine learning algorithms to first …

Adaptive finite differencing in high accuracy electronic structure calculations

EL Briggs, W Lu, J Bernholc - npj Computational Materials, 2024 - nature.com
A multi-order Adaptive Finite Differencing (AFD) method is developed for the kinetic energy
operator in real-space, grid-based electronic structure codes. It uses atomic pseudo orbitals …

Real-Space Pseudopotential Method for the Calculation of Third-Row Elements X-ray Photoelectron Spectroscopic Signatures

L Liu, Q Xu, L dos Anjos Cunha, H **n… - Journal of Chemical …, 2024 - ACS Publications
X-ray photoelectron spectroscopy (XPS) is a powerful characterization technique that
unveils subtle chemical environment differences via core–electron binding energy (CEBE) …

Nonlocal kinetic energy density functionals for isolated systems obtained via local density approximation kernels

Q Xu, J Lv, Y Wang, Y Ma - Physical Review B, 2020 - APS
Despite a large number of nonlocal kinetic energy density functionals (KEDFs) available for
large-scale calculations, most of those nonlocal KEDFs designed for the extended systems …

Nonlocal kinetic energy density functional via line integrals and its application to orbital-free density functional theory

Q Xu, Y Wang, Y Ma - Physical Review B, 2019 - APS
Orbital-free density functional theory (OF-DFT) holds great promise for large-scale
simulations since there is a linear scaling for the computational cost. However, OF-DFT …

Accelerating ab initio real-space electronic structure calculations for low-dimensional materials using an atom-sphere grid truncation method

L Xue, Q Xu, C Ma, W Mi, Y Wang, Y **e, Y Ma - Physical Review B, 2024 - APS
In recent decades, the real-space finite-difference implementations of Kohn–Sham density
functional theory have exhibited substantial improvements in computational efficiency for …