Echo of the Quantum Phase Transition of CeCu${}_{6-x}$Au${}_x$ in XPS: Breakdown of Kondo Screening

M. Klein, J. Kroha, H. v. Loehneysen +2

We present an X-ray photoemission study of the heavy-fermion system CeCu${}_{6-x}$Au${}_x$ across the magnetic quantum phase transition of this compound at temperatures above the singl…