We present a physically motivated correlation functional belonging to themeta-generalized gradient approximation (meta-GGA) rung, which can besupplemented with long-range dispersion corrections without introducingdouble-counting of correlation contributions. The functional is derived by themethod of constraint satisfaction, starting from an analytical expression for areal-space spin-resolved correlation hole. The model contains aposition-dependent function that controls the range of the interelectroniccorrelations described by the semilocal functional. With minimal empiricism,this function may be adjusted so that the correlation model blends with aspecific dispersion correction describing long-range contributions. For apreliminary assessment, our functional has been combined with the DFT-D3dispersion correction and full Hartree-Fock (HF)-like exchange. Despite theHF-exchange approximation, its predictions compare favorably with referenceinteraction energies in an extensive set of non-covalently bound dimers.
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