Coupling Between An Optical Phonon and the Kondo Effect

TL;DR

This paper investigates the ultra-fast optical response of Yb_{14}MnSb_{11} and demonstrates for the first time the coupling between an optical phonon mode and the Kondo effect in this ferromagnetic, under-screened Kondo lattice.

Contribution

It provides the first experimental evidence of coupling between an optical phonon and the Kondo effect in a ferromagnetic Kondo lattice material.

Findings

First demonstration of phonon-Kondo coupling.

Evidence of Yb_{14}MnSb_{11} as a ferromagnetic, under-screened Kondo lattice.

Insights into ultra-fast optical response in Kondo systems.

Abstract

We explore the ultra-fast optical response of Yb_{14}MnSb_{11}, providing further evidence that this Zintl compound is the first ferromagnetic, under-screened Kondo lattice. These experiments also provide the first demonstration of coupling between an optical phonon mode and the Kondo effect.