Searches for leptoquarks and heavy leptons with the ATLAS detector at the LHC

Searches of vector-like leptons, heavy Majorana neutrinos, and leptoquarks, using the complete $20.3~fb^{-1}$ luminosity sample of $pp$ collisions collected at $8\mathrm{\ Te\kern -0.1em V}$ by the ATLAS detector, are presented in this review. Signatures are based on the number of high-momentum leptons, jets, $b$-tagged jets, and on the missing momentum size. No excess was observed in any channel, and limits are set on cross sections, masses and couplings, extending the coverage from previous studies on the considered models.