5 papers
Rationalizing defect formation energies in metals and semiconductors with semilocal density functionals
Jorge Vega Bazantes, Timo Lebeda, Akilan Ramasamy +4
The study of defects in materials is of utmost importance for technological applications and the design of new materials. In this work, we analyze the performance of density functi…
Meta-generalized gradient approximation made in the Hartree gauge
Yan Oueis, Akilan Ramasamy, James W. Furness +3
In density functional theory (DFT), exact constraints, fundamental mathematical properties of the exchange-correlation (XC) energy and its underlying XC hole, along with paradigm s…
How Semilocal Are Semilocal Density Functional Approximations? -Tackling Self-Interaction Error in One-Electron Systems
Akilan Ramasamy, Lin Hou, Jorge Vega Bazantes +4
Self-interaction error (SIE), arising from the imperfect cancellation of the spurious classical Coulomb interaction between an electron and itself, is a persistent challenge in mod…
Electron Localization in Non-Compact Covalent Bonds Captured by the r2SCAN+V Approach
Yubo Zhang, Da Ke, Rohan Maniar +4
In density functional theory, the SCAN (Strongly Constrained and Appropriately Normed) and r2SCAN functionals significantly improve over generalized gradient approximation function…
Artificial Symmetry Breaking by Self-Interaction Error
Lin Hou, Cody Woods, Yanyong Wang +7
Symmetry is a cornerstone of quantum mechanics and materials theory, underpinning the classification of electronic states and the emergence of complex phenomena such as magnetism a…