TY - JOUR
T1 - Hard X-ray photoemission study of Mn 2p core-levels of La 1-xSrxMnO3 thin films
AU - Horiba, K.
AU - Taguchi, M.
AU - Kamakura, N.
AU - Yamamoto, K.
AU - Chainani, A.
AU - Takata, Y.
AU - Ikenaga, E.
AU - Namatame, H.
AU - Taniguchi, M.
AU - Awaji, M.
AU - Takeuchi, A.
AU - Miwa, D.
AU - Nishino, Y.
AU - Tamasaku, K.
AU - Ishikawa, T.
AU - Kumigashira, H.
AU - Oshima, M.
AU - Lippmaa, M.
AU - Kawasaki, M.
AU - Koinuma, H.
AU - Kobayashi, K.
AU - Shin, S.
PY - 2005/6
Y1 - 2005/6
N2 - In order to clarify the intrinsic bulk electronic structure of La 1-xSrxMnO3 (LSMO) thin films, we have performed high-energy (hν=5.95 keV) synchrotron photoemission spectroscopy (PES) of Mn 2p core-levels. In sharp contrast with the previous soft X-ray PES (hν=800-1486.6 eV), the high-energy PES spectra exhibit a clear additional peak at the low binding-energy side of the Mn 2p3/2 peak. To check for surface sensitivity, we measured take-off-angle dependence of Mn 2p core-levels. The results indicate that this additional peak originates from the bulk electronic structure. The peak shows a noticeable increase in the metallic phase of LSMO for x=0.2 and 0.4, indicating that the origin of this peak is strongly related to the metallic physical properties of LSMO thin films. A single ion (MO6) cluster calculation including charge transfer from doping-induced states reproduces the new bulk-derived feature observed in Mn 2p core-levels.
AB - In order to clarify the intrinsic bulk electronic structure of La 1-xSrxMnO3 (LSMO) thin films, we have performed high-energy (hν=5.95 keV) synchrotron photoemission spectroscopy (PES) of Mn 2p core-levels. In sharp contrast with the previous soft X-ray PES (hν=800-1486.6 eV), the high-energy PES spectra exhibit a clear additional peak at the low binding-energy side of the Mn 2p3/2 peak. To check for surface sensitivity, we measured take-off-angle dependence of Mn 2p core-levels. The results indicate that this additional peak originates from the bulk electronic structure. The peak shows a noticeable increase in the metallic phase of LSMO for x=0.2 and 0.4, indicating that the origin of this peak is strongly related to the metallic physical properties of LSMO thin films. A single ion (MO6) cluster calculation including charge transfer from doping-induced states reproduces the new bulk-derived feature observed in Mn 2p core-levels.
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U2 - 10.1016/j.elspec.2005.01.008
DO - 10.1016/j.elspec.2005.01.008
M3 - Article
AN - SCOPUS:20244372723
SN - 0368-2048
VL - 144-147
SP - 557
EP - 559
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
ER -