2009/11/30 by E. A. Goremychkin, R. Osborn, I. L. Sashin +6
Chemistry · Materials Science · Physics and Astronomy · #Anderson impurity model #Atomic physics #Chemistry #Condensed matter physics #Crystallography #Energy (signal processing) #Impurity #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Physics #Quantum mechanics #Rare-earth and actinide compounds #Valence (chemistry) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.104.176402
published as Phys. Rev. Lett. 104, 176402 (2010) · 4 pages, 5 figures
openalex publication_date 2010/04/27 · arxiv created 2010/06/02 · arxiv updated 2010/06/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a neutron scattering investigation of Ce_1\ensuremath-xYxAl3 as a function of chemical pressure, which induces a transition from heavy-fermion behavior in CeAl3 (TK=5 K) to a mixed-valence state at x=0.5 (TK=150 K). The crossover can be modeled accurately on an absolute intensity scale by an increase in the k\mathrm\text\ensuremath-f hybridization, Vkf, within the Anderson impurity model. Surprisingly, the principal effect of the increasing Vkf is not to broaden the low-energy components of the dynamic magnetic susceptibility but to transfer spectral weight to high energy.