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

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dc.creatorKlein, M.
dc.creatorKroha, J.
dc.creatorLoehneysen, H. v.
dc.creatorStockert, O.
dc.creatorReinert, F.
dc.date2008-11-05
dc.date2009-01-25
dc.date.accessioned2026-07-07T12:40:50Z
dc.date.available2026-07-07T12:40:50Z
dc.descriptionWe 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 single-ion Kondo temperature $T_K$. In dependence of the Au concentration $x$ we observe a sudden change of the $f$-occupation number $n_f$ and the core-hole potential $U_{df}$ at the critical concentration $x_c=0.1$. We interpret these findings in the framework of the single-impurity Anderson model. Our results are in excellent agreement with findings from earlier UPS measurements %\cite{klein08qpt} and provide further information about the precursors of quantum criticality at elevated temperatures.
dc.description5 pages, 3 figures; published version, references updated, minor changes in wording
dc.identifierhttps://arxiv.org/abs/0811.0749
dc.identifierhttp://arxiv.org/abs/0811.0749
dc.identifierPhys. Rev. B 79, 075111 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.075111
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219568
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleEcho of the Quantum Phase Transition of CeCu$_{6-x}$Au$_x$ in XPS: Breakdown of Kondo Screening
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