T. Saitoh et al., TEMPERATURE-DEPENDENT VALENCE-BAND PHOTOEMISSION SPECTRA OF LA1-XSRXMNO3, Physical review. B, Condensed matter, 56(14), 1997, pp. 8836-8840
We have studied the temperature dependence of the photoemission spectr
a of La1-xSrxMnO3 (x=0.0, 0.2, and 0.4) and found that the spectral li
ne shape dramatically changes in the entire valence-band region, parti
cularly for x=0.2 and 0.4. By contrast, the spectra of La0.6Sr0.4CoO3
show no significant temperature dependence. From comparison between th
e temperature-and composition-(x) dependent spectral changes and the t
emperature-composition phase diagram of La1-xSrxMnO3, we suggest that
the changes are related to the degree of hole localization on oxygen p
orbitals, which is influenced by electron-lattice coupling and magnet
ic correlations.