Experimental and theoretical electronic structure of EuRh2As2

TitleExperimental and theoretical electronic structure of EuRh2As2
Publication TypeJournal Article
Year of Publication2012
AuthorsPalczewski AD, Dhaka RS, Lee Y, Singh Y, Johnston DC, Harmon BN, Kaminski A
Journal TitlePhysical Review B
Volume85
Pages174509
Date Published05
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000303910400005
Keywords43 k, compound, lao1-xfxfeas, metal, superconductivity, transition
Abstract

The Fermi surfaces (FS's) and band dispersions of EuRh2As2 have been investigated using angle-resolved photoemission spectroscopy. The results in the high-temperature paramagnetic state are in good agreement with the full-potential linearized augmented-plane-wave calculations, especially in the context of the shape of the two-dimensional FS's and band dispersion around the Gamma (0,0) and X (pi, pi) points. Interesting changes in band folding are predicted by the theoretical calculations below the magnetic transition temperature T-N approximate to 47 K. However, by comparing the FS's measured at 60 and 40 K, we did not observe any signature of this transition at the Fermi energy, indicating a very weak coupling of the electrons to the ordered magnetic moments or strong fluctuations. Furthermore, the FS does not change across the temperature (approximate to 25 K) where changes are observed in the Hall coefficient. Notably, the Fermi surface deviates drastically from the usual FS of the superconducting iron-based AFe(2)As(2) parent compounds, including the absence of nesting between the Gamma and X FS pockets.

URL<Go to ISI>://WOS:000303910400005
DOI10.1103/PhysRevB.85.174509
Alternate JournalPhys. Rev. B