Resonant photoemission spectroscopy of layered triangular lattices Ag 2MO2 (M = Ni and Mn): Evidence for M 3d states at Fermi level

Ritsuko Eguchi, Hiroyuki Yoshida, Yoshihiko Okamoto, Ashish Chainani, Masaharu Matsunami, Yukiaki Ishida, Masaki Oura, Yasunori Senba, Haruhiko Ohashi, Shik Shin, Zenji Hiroi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report on the soft X-ray photoemission and absorption spectroscopy of Ag2NiO2 and Ag2MnO2, which consist of alternate stacks of (Ag2)+ and (MO2) - layers. The core-level photoemission and absorption spectra indicate mainly trivalent Ni3+ in Ag2NiO2, and trivalent Mn3+ with an admixture of Mn2+ states in Ag 2MnO2. The M 2p-3d resonant photoemission clearly shows that the density of states at the Fermi level includes the M 3d character in both compounds. The results indicate that the Ni 3d and Mn 3d states at the Fermi level are responsible for the significant mass enhancement of carriers, as seen in the transport properties of Ag2NiO2 and Ag 2MnO2.

Original languageEnglish
Article number023704
Journaljournal of the physical society of japan
Volume79
Issue number2
DOIs
Publication statusPublished - Feb 1 2010
Externally publishedYes

Keywords

  • Absorption spectroscopy
  • Electronic structure
  • Frustration
  • Layered triangular lattice
  • Resonant photoemission spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Eguchi, R., Yoshida, H., Okamoto, Y., Chainani, A., Matsunami, M., Ishida, Y., Oura, M., Senba, Y., Ohashi, H., Shin, S., & Hiroi, Z. (2010). Resonant photoemission spectroscopy of layered triangular lattices Ag 2MO2 (M = Ni and Mn): Evidence for M 3d states at Fermi level. journal of the physical society of japan, 79(2), [023704]. https://doi.org/10.1143/JPSJ.79.023704