We extend our recent SOGGA11 approximation to the exchange-correlation functional to include a percentage of Hartree-Fock exchange. The new functional, called SOGGA11-X, has better overall performance for a broad chemical database than any previously available global hybrid generalized gradient approximation, and in addition it satisfies an extra physical constraint in that it is correct to second order in the density-gradient.
Bibliographical noteFunding Information:
The authors are grateful to Yan Zhao for many valuable contributions. This material is based upon work supported by the National Science Foundation under Grant No. CHE09-56776.