Electronic structure of URu${}_2$Si${}_2$ in paramagnetic phase: Three-dimensional angle resolved photoelectron spectroscopy study

Abstract

The three-dimensional (3D) electronic structure of the hidden order compound URu${}_2$Si${}_2$ 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 $\mathrm{U}5f$ state were observed near $E_{\mathrm{F}}$, formed by the hybridization with the $\mathrm{Ru}4d$ states. The energy dispersion of the quasi-particle band is significantly depend on $k_z$, 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 URu${}_2$Si${}_2$ is an essential ingredient for modeling its hidden-order transition.

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)

Cited by in corpus (1)

• Global perspectives of the bulk electronic structure of URu${}_2$Si${}_2$ from angle-resolved photoemission