The three-dimensional (3D) electronic structure of the hidden order compound URu2Si2 in a paramagnetic phase was revealed using a 3D angle-resolved photoelectron spectroscopy where the electronic structure of the entire Brillouin zone is obtained by scanning both incident photon energy and detection angles of photoelectrons. The quasi-particle bands with enhanced contribution from the U5f state were observed near EF, formed by the hybridization with the Ru4d states. The energy dispersion of the quasi-particle band is significantly depend on kz, indicating that they inherently have a 3D nature. The band-structure calculation qualitatively explain the characteristic features of the band structure and Fermi surface although the electron correlation effect strongly renormalizes the quasi-particle bands. The 3D and strongly-correlated nature of the quasi-particle bands in URu2Si2 is an essential ingredient for modeling its hidden-order transition.
@article{arxiv.2103.16072,
title = {Electronic structure of URu$_2$Si$_2$ in paramagnetic phase: Three-dimensional angle resolved photoelectron spectroscopy study},
author = {Shin-ichi Fujimori and Yukiharu Takeda and Hiroshi Yamagami and Etsuji Yamamoto and Yoshinori Haga},
journal= {arXiv preprint arXiv:2103.16072},
year = {2021}
}
Comments
13 pages, 4 figures, submitted to Focus on Electronic Structure of $4f$ and $5f$ Systems, Electronic Structure (https://iopscience.iop.org/journal/2516-1075/page/focus-on-electronic-structure-of-4f-and-5f-systems)