69 citations · 187 across the 11 of their papers we have counts for
11 papers
Interpretable machine learning to understand the performance of semi local density functionals for materials thermochemistry
Santosh Adhikari, Christopher J. Bartel, Christopher Sutton
This study investigates the use of machine learning (ML) to correct the enthalpy of formation (Hf) from two separate DFT functionals, PBE and SCAN, to the experimental Hf across 10…
Self-interaction corrected Kohn-Sham effective potentials using the density-consistent effective potential method
Carlos M. Diaz, Luis Basurto, Santosh Adhikari +4
Density functional theory (DFT) and beyond-DFT methods are often used in combination with photoelectron spectroscopy to obtain physical insights into the electronic structure of mo…
Opening band gaps of low-dimensional materials at the meta-GGA level of density functional approximations
Bimal Neupane, Hong Tang, Niraj K. Nepal +2
The recent TASK meta-GGA density functional [Phys. Rev. Research, 1, 033082 (2019)] is constructed with an enhanced nonlocality in the generalized Kohn-Sham scheme, and therefore h…
Resolving the structure-energy dilemma at organic-inorganic interfaces: Adsorption of benzene, thiophene, and xenon over coinage metal surfaces
Santosh Adhikari, Niraj K. Nepal, Hong Tang +1
Semilocal (SL) density functional approximations (DFAs) are widely applied but have limitations due to their inability to incorporate long-range van der Waals (vdW) interaction. No…
The Fermi-Löwdin self-interaction correction for ionization energies of organic molecules
Santosh Adhikari, Biswajit Santra, Shiqi Ruan +4
(Semi)-local density functional approximations (DFAs) suffer from self-interaction error (SIE). When the first ionization energy (IE) is computed as the negative of the highest-occ…
Formation energy puzzle in intermetallic alloys: Random phase approximation fails to predict accurate formation energies
Niraj K. Nepal, Santosh Adhikari, Bimal Neupane +1
We performed density functional calculations to estimate the formation energies of intermetallic alloys. We used two semilocal approximations, the generalized gradient approximatio…
Understanding plasmon dispersion in nearly-free-electron metals: the relevance of exact constraints for novel exchange-correlation kernels within time-dependent density functional theory
Niraj K. Nepal, Santosh Adhikari, Bimal Neupane +3
Small-wavevector excitations in Coulomb-interacting systems can be decomposed into the high-energy collective longitudinal plasmon and the low-energy single-electron excitations. A…
Molecule-surface interaction from van der Waals-corrected semilocal density functionals: the example of thiophene on transition-metal surfaces
Santosh Adhikari, Hong Tang, Bimal Neupane +2
Semi-local density functional approximations are widely used. None of them can capture the long-range van der Waals (vdW) attraction between separated subsystems, but they differ r…
Treating different bonding situations: Revisiting Au-Cu alloys using the random phase approximation
Niraj K. Nepal, Santosh Adhikari, Jefferson E. Bates +1
The ground state equilibrium properties of copper-gold alloys have been explored with the state of art random phase approximation (RPA). Our estimated lattice constants agree with…
Stretched or noded orbital densities and self-interaction correction in density functional theory
Chandra Shahi, Puskar Bhattarai, Kamal Wagle +17
Semi-local approximations to the density functional for the exchange-correlation energy of a many-electron system necessarily fail for lobed one-electron densities, including not o…
Optimizing Polar Angle Asymmetry Observables at Colliders
Simon Dalley, Santosh Adhikari, Pavel Nadolsky
Angular asymmetries are simple, intuitive, model-independent observables used to identify spins of new elementary particles. In the case of Drell-Yan-like boson resonances, we gene…