  By incorporating the nonempirical SCAN semilocal density functional [Sun,
Ruzsinszky, and Perdew, Phys. Rev. Lett. 115, 036402 (2015)] in the underlying
expression of four existing hybrid and double-hybrid models, we propose one
hybrid (SCAN0) and three double-hybrid (SCAN0-DH, SCAN-QIDH, and SCAN0-2)
density functionals, which are free from any fitted parameters. The SCAN-based
double-hybrid functionals consistently outperform their parent SCAN semilocal
functional for self-interaction problems and noncovalent interactions. In
particular, SCAN0-2, which includes about 79% of Hartree-Fock exchange and 50%
of second-order Moller-Plesset correlation, is shown to be reliably accurate
for a very diverse range of applications, such as thermochemistry, kinetics,
noncovalent interactions, and self-interaction problems.
