Physically motivated iso-orbital indicator for meta-GGA exchange functionals

Jeet Sharma, Abhishek Bhattacharjee, Bikash Patra +1

The iso-orbital indicator $\hat{I}\pm =(\ddot{I}„-\ddot{I}{„}^{\mathrm{vW}})/\ddot{I}{„}^{\mathrm{UEG}}$ is a key ingredient of meta-generalized gradient approximation (meta-GGA) functionals, but diverges in low-dens…