2007/10/15 by P. Hansmann, A. Severing, Z. Hu +13 · 1 citation
Materials Science · Physics and Astronomy · #Absorption (acoustics) #Absorption spectroscopy #Atomic physics #Condensed matter physics #Crystal (programming language) #Crystal field theory #Ground state #Ion #Iron-based superconductors research #Magnetic Properties of Alloys #Materials science #Molecular physics #Optics #Physics #Rare-earth and actinide compounds #Scattering #Spectral line #Spectroscopy #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.100.066405
published as Phys. Rev. Lett. 100 066405 (2008)
arxiv created 2007/10/15 · openalex publication_date 2008/02/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We infer that soft-x-ray absorption spectroscopy is a versatile method for the determination of the crystal-field ground state symmetry of rare earth heavy fermion systems, complementing neutron scattering. Using realistic and universal parameters, we provide a theoretical mapping between the polarization dependence of Ce M(4,5) spectra and the charge distribution of the Ce 4f states. The experimental resolution can be orders of magnitude larger than the 4f crystal-field splitting itself. To demonstrate the experimental feasibility of the method, we investigated CePd2Si2, thereby settling an existing disagreement about its crystal-field ground state.