Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7998110 | Journal of Alloys and Compounds | 2015 | 26 Pages |
Abstract
The electronic structure of a heavy-fermion superconductor Ce2PdIn8 was investigated by means of X-ray photoelectron spectroscopy (XPS) and ab initio density functional band structure calculations. The Ce 3d core-level XPS spectra point to stable trivalent configuration of Ce atoms that is also reproduced in the band structure calculations within the generalized gradient approximation GGA+U approach. Analysis of the 3d9f2 weight in the 3d XPS spectra within the Gunnarsson-Schönhammer model suggests that the onsite hybridization energy between Ce 4f and the conduction band states, Îfs, is â¼120Â meV, which is about 30Â meV larger than Îfs in isostructural Ce2TIn8 compounds with TÂ =Â Co, Rh, and Ir. Taking into account a Coulomb repulsion U on both the Ce 4f and Pd 4d states in electronic band structure calculations, a satisfactory agreement was found between the calculated density of states (DOS) and the measured valence band XPS spectra.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
M. WerwiÅski, A. Szajek, A. Ålebarski, D. Kaczorowski,