The spin glass–Kondo competition in heavy fermion systems: study of the quantum critical point

Abstract

We study here the Kondo-spin glass competition in a theoretical model with an intra-site Kondo-like exchange interaction and an inter-site interaction with random couplings between localized spins and with an additional transverse field. We obtain two second-order transition lines from the spin-glass state to the paramagnetic one and then to the Kondo state, where both end in two distinct quantum critical points.