Abstract
We present high-resolution photoemission spectroscopy studies on the Kondo resonance of the strongly correlated Ce system . By exploiting the thermal broadening of the Fermi edge we analyze position, spectral weight, and temperature dependence of the low-energy spectral features, whose major weight lies above the Fermi level . We also present theoretical predictions based on the single-impurity Anderson model using an extended noncrossing approximation, including all spin-orbit and crystal field splittings of the states. The excellent agreement between theory and experiment provides strong evidence that the spectral properties of can be described by single-impurity Kondo physics down to .
- Received 2 April 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.106401
©2001 American Physical Society