Photoemission study of Rh17S15 superconductor

Masaki Fukui, Rikiya Yoshida, Yoshiaki Nakamura, Yukako Kato, Takayuki Muro, Rikio Settai, Yoshichika Onuki, Hisatomo Harima, Masaaki Hirai, Yuji Muraoka, Takayoshi Yokoya

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have investigated the electronic structures of Rh17S 15 by using soft x-ray photoemission spectroscopy and first principle band structure calculations. While S 2p core level spectra are explained by symmetric components, Rh 3d core level exhibits asymmetric line shape, suggesting a dominant Rh 4d character at the states near the Fermi level. The binding energy of Rh 4d in Rh17S15 is similar to the one in Rh metal, and this observation implies metallic Rh-Rh bonding. Many features in experimental valence spectra are reasonably described by the calculations, indicating that one particle approximation is a good starting point to understand the electronic properties of Rh17S15. The comparison between the experiment and the calculation suggests that Rh 4d character at the states near the Fermi level is essential for the correlated superconductivity in Rh17S15. However, some deviation between the experiment and the calculation as well as a finite mass enhancement are found, indicating some corrections on the treatment of electron-phonon coupling and/or electron correlations are necessary.

Original languageEnglish
Article numberSA111
Journaljournal of the physical society of japan
Volume80
Issue numberSUPPL. A
DOIs
Publication statusPublished - Jul 1 2011

    Fingerprint

Keywords

  • Correlated superconductor
  • Electronic structures
  • Soft x-ray photoemission spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Fukui, M., Yoshida, R., Nakamura, Y., Kato, Y., Muro, T., Settai, R., Onuki, Y., Harima, H., Hirai, M., Muraoka, Y., & Yokoya, T. (2011). Photoemission study of Rh17S15 superconductor. journal of the physical society of japan, 80(SUPPL. A), [SA111]. https://doi.org/10.1143/JPSJS.80SA.SA111