High frequency study of the orbital ordering resonance in the strongly correlated heavy fermion metal CeB6

TL;DR

This study investigates the orbital ordering resonance in CeB6 across a broad frequency spectrum, revealing a frequency-dependent g-factor increase and the emergence of a new resonance at higher frequencies, advancing understanding of heavy fermion magnetic properties.

Contribution

It provides the first detailed high-frequency analysis of the orbital ordering resonance in CeB6, including the discovery of a new magnetic resonance at frequencies above 200 GHz.

Findings

g-factor increases from 1.55 to 1.7 with frequency

discovery of a new resonance with g-factor 1.2-1.3 at >200 GHz

resonance behavior elucidates magnetic properties of CeB6

Abstract

We report results of the study of the recently discovered magnetic resonance in the orbitally ordered phase of CeB6 (the orbital ordering resonance) in a wide frequency range 44-360 GHz. It is found that the g-factor for this resonance increases with frequency from g(44 GHz)~1.55 to g(>250 GHz)~1.7. In addition to the orbital ordering resonance for the frequencies exceeding 200 GHz a new magnetic resonance with the g-factor 1.2-1.3 is detected.