84 citations · 359 across the 11 of their papers we have counts for
7 papers · 1 filter
Unconventional Error Cancellation Explains the Success of Hartree-Fock Density Functional Theory for Barrier Heights
Bikash Kanungo, Aaron D. Kaplan, Chandra Shahi +2
Energy barriers, which control the rates of chemical reactions, are seriously underestimated by computationally-efficient semi-local approximations for the exchange-correlation ene…
Symmetry Breaking with the SCAN Density Functional Describes Strong Correlation in the Singlet Carbon Dimer
John P. Perdew, Shah Tanvir ur Rahman Chowdhury, Chandra Shahi +3
The SCAN (strongly constrained and appropriately normed) meta-generalized gradient approximation (meta-GGA), which satisfies all 17 exact constraints that a meta-GGA can satisfy, a…
Understanding density driven errors for reaction barrier heights
Aaron D. Kaplan, Chandra Shahi, Pradeep Bhetwal +2
Delocalization errors, such as charge-transfer and some self-interaction errors, plague computationally-efficient and otherwise-accurate density functional approximations (DFAs). E…
Self-Interaction Correction in Water-Ion Clusters
Kamal Wagle, Biswajit Santra, Puskar Bhattarai +4
We study the importance of self-interaction errors in density functional approximations for various water-ion clusters. We have employed the Fermi-Löwdin orbital self-interaction c…
A Step in the Direction of Resolving the Paradox of Perdew-Zunger Self-interaction Correction. II. Gauge Consistency of the Energy Density at Three Levels of Approximation
Puskar Bhattarai, Kamal Wagle, Chandra Shahi +7
The Perdew-Zunger(PZ) self-interaction correction (SIC) was designed to correct the one-electron limit of any approximate density functional for the exchange-correlation (xc) energ…
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…