Abstract
Transition-metal (TM) oxides have been attracting great interest be- cause of their remarkable physical properties such as metal-insulator transition, colossal magnetoresistance, and high-temperature superconductivity. These prop- erties are considered to originate from strong electron correlation. Nowadays a lot of progress has been made in the photoemission studies of TM oxides with three- dimensional perovskite structures owing to the availability of high-quality single crystals of bulk and epitaxial thin films. Even angle-resolved photoemission has be- come possible through the progress in synthesizing high-quality samples. Here, we give an overview of high-resolution photoemission studies on perovskite-type Ti, V, Mn, Fe, Ni and Ru oxides, and show how high-resolution photoemission has con- tributed to the understanding of the electronic structures of these materials.
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