Abstract
A central key to understanding heavy-fermion systems involves revealing how itinerant low-energy excitations emerge from local moments. An effective way to understand the -electron behavior is to compare the electronic structure of -electron compounds with a reference isostructural compound with no electrons. Here we present a systematic electronic structure study of , which is a non- reference compound of the heavy-fermion superconductor . Our angle-resolved photoemission spectroscopy study of the three-dimensional Fermi surface and band structure of highlights the rather three-dimensional electronic character of this compound. The conduction bands of are almost identical to that of , though obvious differences can be found in the low-energy electronic structure. Finally, we give a quantitative analysis of the Fermi pocket change in and , which may be helpful for understanding the important “large” and “small” Fermi surface issue in heavy-fermion compounds.
- Received 10 May 2019
- Revised 2 July 2019
DOI:https://doi.org/10.1103/PhysRevB.100.035117
©2019 American Physical Society