TY - JOUR
T1 - Combining photoemission and optical spectroscopies for reliable valence determination in YbS and Yb metal
AU - Matsunami, M.
AU - Chainani, A.
AU - Taguchi, M.
AU - Eguchi, R.
AU - Ishida, Y.
AU - Takata, Y.
AU - Okamura, H.
AU - Nanba, T.
AU - Yabashi, M.
AU - Tamasaku, K.
AU - Nishino, Y.
AU - Ishikawa, T.
AU - Senba, Y.
AU - Ohashi, H.
AU - Tsujii, N.
AU - Ochiai, A.
AU - Shin, S.
PY - 2008/11/19
Y1 - 2008/11/19
N2 - Hard x-ray photoemission and optical spectroscopies have been performed on YbS and Yb metal to determine the precise f -electron occupation. A comparison of the photoemission spectra with the energy-loss functions in bulk and surface, obtained from optical reflectivity, enables us to distinguish between the energy-loss satellite of Yb2+ peak and the Yb3+ multiplet. The results clearly indicate a purely divalent Yb state except for the surface of YbS which is altered by oxidation. We demonstrate that the present method is highly reliable in identifying the electronic structure and the mean valence in f -electron systems.
AB - Hard x-ray photoemission and optical spectroscopies have been performed on YbS and Yb metal to determine the precise f -electron occupation. A comparison of the photoemission spectra with the energy-loss functions in bulk and surface, obtained from optical reflectivity, enables us to distinguish between the energy-loss satellite of Yb2+ peak and the Yb3+ multiplet. The results clearly indicate a purely divalent Yb state except for the surface of YbS which is altered by oxidation. We demonstrate that the present method is highly reliable in identifying the electronic structure and the mean valence in f -electron systems.
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U2 - 10.1103/PhysRevB.78.195118
DO - 10.1103/PhysRevB.78.195118
M3 - Article
AN - SCOPUS:57149140007
SN - 1098-0121
VL - 78
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 19
M1 - 195118
ER -