TEMPERATURE-DEPENDENT VALENCE-BAND PHOTOEMISSION SPECTRA OF LA1-XSRXMNO3

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.