Transport and magnetic behavior under pressure and high-resolution photoemission studies of Ce2Rh(o.7)Co(0.3)Si3, an alloy on the verge of quantum critical point

TL;DR

This study investigates how pressure affects the magnetic and electronic properties of Ce2Rh(0.7)Co(0.3)Si3, revealing quantum critical behavior and supporting a spin-density-wave model through magnetization, resistivity, and photoemission analyses.

Contribution

It demonstrates that external pressure mimics Co substitution effects, suppressing magnetic order and inducing quantum criticality in Ce2Rh(0.7)Co(0.3)Si3, with high-resolution photoemission confirming Kondo features.

Findings

Pressure suppresses magnetic ordering in the alloy.

High-resolution spectra show Kondo features at ambient conditions.

Results support a spin-density-wave interpretation.

Abstract

We report the influence of external pressure on the temperature dependence of magnetization and electrical resistivity as well as high-resolution photoemission studies for an alloy, Ce2Rh(0.7)Co(0.3)Si3, ordering magnetically below 3 K. It is found that the external pressure has the same effect as that induced by (further) Co substitution for Rh in the series, Ce2Rh(1-x)Co(x)Si3, resulting in qualitative changes in the features in the magnetic and transport data, with a suppression of magnetic ordering followed by quantum critical point effect. The high-resolution spectra reveal signature of Kondo feature at ambient feature. These findings support the validity of spin-density-wave picture in this series.