Quantum criticality in Ce2PdIn8: thermoelectric study

TL;DR

This study investigates the thermoelectric properties of Ce2PdIn8, revealing anomalies near quantum criticality, with evidence supporting an antiferromagnetic spin-density-wave scenario at the quantum critical point.

Contribution

First thermoelectric study of Ce2PdIn8 showing anomalous behavior linked to quantum criticality and suggesting a specific magnetic scenario.

Findings

S and v show anomalous low-temperature behavior

S/T and v/T diverge logarithmically at zero temperature

Results support antiferromagnetic spin-density-wave QCP scenario

Abstract

We report the Nernst effect (v) and thermoelectric power (S) data for the Ce2PdIn8 heavy-fermion compound. Both S and v behave anomalously at low temperatures: the thermopower shows a Kondo-like maximum at T = 37 K, while the Nernst coefficient becomes greatly enhanced and field dependent below T ~ 30 K. In the zero-T limit S/T and v/T diverge logarithmically, what is related to occurrence of the quantum critical point (QCP). Presented results suggest that the antiferromagnetic spin-density-wave scenario may be applicable to QCP in Ce2PdIn8.