Abstract
Ce and resonant photoemission spectroscopies have been performed on the heavy-fermion compound , where the ground-state properties systematically change from the magnetic to nonmagnetic regime via the quantum critical point (QCP, ). Co-substitution dependence of the bulk Ce electronic structure shows gradual evolution of Kondo resonance at the Fermi level together with the reduction of the Ce final state in agreement with the single impurity Anderson model (SIAM). The SIAM analysis shows that the Kondo temperature and specific-heat coefficient change continuously from the weakly hybridized to strongly hybridized . These indicate that the Ce electronic structure of changes continuously through the QCP.
- Received 7 September 2005
DOI:https://doi.org/10.1103/PhysRevB.72.220405
©2005 American Physical Society