2006/04/30 by M. Yano, Yano, M., A. Sekiyama +13
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.cond-mat/0605021
openalex publication_date 2006/04/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Three-dimensional Fermi surfaces at a high temperature have been clarified for a strongly correlated Ce compound, ferromagnet CeRu2Ge2 in the paramagnetic phase, by virtue of a soft x-ray hν-dependent (700-860 eV) ARPES. Although the observed Fermi surfaces as well as quasiparticle dispersions are partly explained by a band-structure calculation based on a localized 4f model, qualitative discrepancy in experiments, between our APRES in the paramagnetic phase and de Haas-van Alphen measurement in the ferromagnetic phase, is revealed. This suggests a fundamental change in the 4f contribution to the Fermi surfaces across the magnetic phase transition widely seen for Ce compounds.