Dimensional trend in CePt2In7, Ce-115 compounds, and CeIn3

TL;DR

This study uses realistic Kondo-lattice simulations to compare the magnetic quantum criticality of CePt2In7, CeIn3, and Ce-115 compounds, revealing a trend related to their dimensionality and hybridization effects.

Contribution

It provides the first detailed simulation-based comparison of these compounds, highlighting the influence of dimensionality and hybridization on quantum critical behavior.

Findings

CeIn3 is closest to the magnetic quantum critical point.

CePt2In7 has the smallest distance to the critical point among the studied compounds.

The trend is linked to the frequency dependence of hybridization between Ce 4f-electrons and conduction bands.

Abstract

We present realistic Kondo-lattice simulation results for the recently-discovered heavy-fermion antiferromagnet CePt2In7 comparing with its three-dimensional counterpart CeIn3 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 CePt2In7 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.