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Electronic structure of Ce2RhIn8: A two-dimensional heavy-fermion system studied by angle-resolved photoemission spectroscopy

TitleElectronic structure of Ce2RhIn8: A two-dimensional heavy-fermion system studied by angle-resolved photoemission spectroscopy
Publication TypeJournal Article
Year of Publication2015
AuthorsJiang, R, Mou, DX, Liu, C, Zhao, X, Yao, YX, Ryu, H, Petrovic, C, Ho, KM, Kaminski, A
JournalPhysical Review B
Volume91
Pagination165101
Date Published04
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000352129400001
Keywordspoints, superconductivity
Abstract

We use angle-resolved photoemission spectroscopy (ARPES) to study the two-dimensional (2D) heavy-fermion superconductor, Ce2RhIn8. 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 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.

DOI10.1103/PhysRevB.91.165101
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Complex States