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

Jeet Sharma, Abhishek Bhattacharjee, Bikash Patra +1

The iso-orbital indicator $\alpha =(\tau -{\tau }^{\mathrm{vW}})/{\tau }^{\mathrm{UEG}}$ is a key ingredient of meta-generalized gradient approximation (meta-GGA) functionals, but diverges in low-density…