2024/09/12 by Jiao-Jiao Song, Song, Jiao-Jiao, Qi-Yi Wu +33
Materials Science · Physics and Astronomy · #Electron and X-Ray Spectroscopy Techniques #FOS: Physical sciences #Nuclear Physics and Applications #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #X-ray Spectroscopy and Fluorescence Analysis
paper · pdf · doi:10.48550/arxiv.2409.07816
openalex publication_date 2024/09/12 · openalex created_date 2024/10/23 · openalex updated_date 2026/07/28
This study investigates the 5f-electron-conduction electron hybridization process in the heavy fermion superconductor UPd2Al3 using a combination of angle-resolved photoemission spectroscopy (ARPES) and time-resolved photoemission spectroscopy (tr-PES). ARPES measurements reveal the formation of a hybridization gap at a temperature of approximately 75 K, which becomes more pronounced as the temperature decreases. Notably, the persistence of a flat U 5f band at temperatures well above the hybridization onset challenges conventional understanding. Our findings demonstrate a non-monotonic temperature dependence of the quasiparticle relaxation time, with an anomalous decrease at 20 K, suggesting complex electronic and magnetic interactions. These findings provide detailed insights into the 5f-electron hybridization process in UPd2Al3, with significant implications for the understanding of heavy fermion superconductivity and the role of 5f-electron hybridization in uranium-based materials.