We use angle-resolved photoemission spectroscopy (ARPES) to study the two-dimensional (2D) heavy-fermion superconductor, ${\mathrm{Ce}}_2{\mathrm{RhIn}}_8$. The Fermi surface is rather complicated and consists of several hole and electron pockets with one of the sheets displaying strong nesting properties with a $\mathbf{q}$ vector of (0.32, 0.32) $\pi /a$. We do not observe $k_z$ dispersion of the Fermi sheets, which is consistent with the expected 2D character of the electronic structure. Comparison of the ARPES data to band-structure calculations suggests that a localized picture of the $f$ electrons works best. While there is some agreement in the overall band dispersion and location of the Fermi sheets, the model does not reproduce all observed bands and is not completely accurate for those it does. Our data paves the way for improving the band-structure calculations and the general understanding of the transport and thermodynamical properties of this material.

• Received 14 November 2014
• Revised 9 February 2015

DOI:https://doi.org/10.1103/PhysRevB.91.165101