High-Field de Haas-van Alphen Effect in non-centrosymmetric CeCoGe3 and LaCoGe3

TL;DR

This study investigates the de Haas-van Alphen effect in non-centrosymmetric CeCoGe3 and LaCoGe3 at high magnetic fields, revealing new intrinsic frequencies and significant effective mass enhancements, advancing understanding of their electronic structures.

Contribution

The paper reports the discovery of new high-frequency oscillations and large effective masses in CeCoGe3 and LaCoGe3 at high magnetic fields, providing novel insights into their Fermi surfaces.

Findings

Two new high frequencies observed in both compounds.

Effective masses in CeCoGe3 are strongly enhanced (~30 times electron mass).

Frequencies are intrinsic, not due to magnetic breakdown.

Abstract

We report on de Haas-van Alphen effect measurements in the non-centrosymmetric systems CeCoGe3 and LaCoGe3 in magnetic field up to 28 Tesla. In both compounds, two new high frequencies were observed in high fields. The frequencies were not detected in previous lower field measurements. The frequencies do not originate from magnetic breakdown, and, therefore, are likely to be intrinsic features of the compounds. In CeCoGe3, the corresponding effective masses are strongly enhanced, being of the order of 30 bare electron masses.