Magnetic quantum critical point and dimensionality trend in cerium-based heavy-fermion compounds

Abstract

We present realistic Kondo-lattice simulation results for the recently discovered heavy-fermion antiferromagnet CePt(2)In(7) comparing with its three-dimensional counterpart CeIn(3) and the less two-dimensional ones, Ce-115's. We find that the distance to the magnetic quantum critical point is the largest for CeIn3 and the smallest for Ce-115's, and CePt(2)In(7) falls in between. We argue that the trend in quasi-two-dimensional materials stems from the frequency dependence of the hybridization between cerium 4f electrons and the conduction bands.