TY - JOUR
T1 - Resonant photoemission spectroscopy of layered triangular lattices Ag 2MO2 (M = Ni and Mn)
T2 - Evidence for M 3d states at Fermi level
AU - Eguchi, Ritsuko
AU - Yoshida, Hiroyuki
AU - Okamoto, Yoshihiko
AU - Chainani, Ashish
AU - Matsunami, Masaharu
AU - Ishida, Yukiaki
AU - Oura, Masaki
AU - Senba, Yasunori
AU - Ohashi, Haruhiko
AU - Shin, Shik
AU - Hiroi, Zenji
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010/2
Y1 - 2010/2
N2 - 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.
AB - 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.
KW - Absorption spectroscopy
KW - Electronic structure
KW - Frustration
KW - Layered triangular lattice
KW - Resonant photoemission spectroscopy
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U2 - 10.1143/JPSJ.79.023704
DO - 10.1143/JPSJ.79.023704
M3 - Article
AN - SCOPUS:77049115454
VL - 79
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 2
M1 - 023704
ER -