SCES Webinar Series

Título: A comparative x-ray study of UM₂Si₂ compounds with 5f electron duality

Abstract:

We have carried out hard x-ray photoelectron spectroscopy (HAXPES) measurements at the U 4f core level and non-resonant inelastic x-ray scattering (NIXS) at the U O_4,5 edges of UT₂Si₂ compounds that all form in the tetragonal ThCr₂Si₂ structure but exhibit different ground state properties: UFe₂Si₂ is a Pauli paramagnet; URu₂Si₂ is the famous hidden order compound of which the order parameter is still fiercely debated despite 30 years of intense experimental and theoretical studies; UPd₂Si₂ and UNi₂Si₂ are antiferromagnets with T_N well above 100 K and sizeable ordered magnetic moments. We have determined the degree of the 5f-electron localization (HAXPES) as well as the symmetry of the 5f ground state wave function (NIXS) across these very different compounds.

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Zoom: https://zoom.us/j/9909853989?pwd=ViszeWF4ei9KdnRzaWk2MENsamdTUT09

Meeting ID : 990 985 3989
Password: 253510  

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