  Associated with two TeV-scale leptoquark scalars, a dark matter fermion which
is the neutral component of an isotriplet can mediate a testable neutrinoless
double beta decay at one-loop level. The dark matter fermion with determined
mass and spin-independent scattering can be verified by the future dark matter
direct detection experiments. We also discuss the implications on neutrino
masses and baryon asymmetry.
