Angle-resolved photoemission study of USb2: the 5f band structure

TL;DR

This study uses angle-resolved photoemission to reveal the narrow 5f electron bands and three-dimensional electronic structure of USb2 at low temperature, providing detailed insights into its electronic properties.

Contribution

First detailed ARPES investigation of USb2 revealing the narrow 5f bands and three-dimensional electronic structure.

Findings

Observation of the narrowest 5f-electron feature to date

Identification of three-dimensional electronic structure

Peak linewidth below 10 meV

Abstract

Single crystal antiferromagnetic USb2 was studied at 15K by angle-resolved photoemission with an overall energy resolution of 24 meV. The measurements unambiguously show the dispersion of extremely narrow bands situated near the Fermi level. The peak at the Fermi level represents the narrowest feature observed in 5f-electron photoemission to date. The natural linewidth of the feature just below the Fermi level is not greater than 10 meV. Normal emission data indicate a three dimensional aspect to the electronic structure of this layered material.