2020/05/08 by Martin Sundermann, Andrea Amorese, Sundermann, Martin +21
Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.2005.03946
openalex publication_date 2020/05/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The application of pressure as well as the successive substitution of Ru with Fe in the hidden order (HO) compound URu2Si2 leads to the formation of the large moment antiferromagnetic phase (LMAFM). Here we have investigated the substitution series URu2-xFexSi2 with x = 0.2 and 0.3 with non-resonant inelastic x-ray scattering (NIXS) and 4f core-level photoelectron spectroscopy with hard x-rays (HAXPES). NIXS shows that the substitution of Fe has no impact on the symmetry of the ground-state wave function. In HAXPES we find no shift of spectral weight that would be indicative for a change of the 5f-electron count. Consequently, changes in the exchange interaction \calJ due to substitution must be minor so that the conjecture of chemical pressure seems unlikely. An alternative scenario is discussed, namely the formation of long range magnetic order due the substitution induced local enhancement of the magnetization in the vicinity of the f-electron ions while the overall electronic structure remains unchanged.