Electron correlations in the k-dependent electronic structure of metallic V$_{2}$O$_{3}$

Both the insulator and metal phases of vanadium sesquioxide serve as paradigms of strongly correlated electron physics. The metallic state displays an incoherent lower Hubbard band and a coherent quasiparticle (QP) peak near the Fermi level. Employing angular-resolved photoemission spectroscopy we are making the first studies of the behavior of the QP band in energy-momentum space. Here we report on electron mass renormalization near the Fermi level, and higher energy kink and ``waterfall'' features such as have been reported for different families of superconducting cuprates. Owing to a variety of coexisting interactions the precise origin of these features remains controversial and is presently actively discussed in the literature. Observation of these features in a paradigm system broadens the basis for discussing and assessing various suggested scenarios.