1. Mott-Hubbard localization: An Overview - Jozef Spałek Marian Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland

2. CONTENTS 1.V 2 O 3, NiS 2-x Se x, 3 He 2.Mott-Hubbard, charge-transfer, Kondo lattices 3.Effective-mass divergence: Fermi liquid  atomic states 4.Effect of orbital ordering: V 2 O 3 ? LaMnO 3 (insulators)

3. a) Metal b) Mott-Hubbard insulator Plane waves (Bloch states) Atomic states Either be wholly slaves or wholly free. (John Dryden, 1687) Delocalized versus localized

5. H. Kuwamoto et al., PRB 22 (1980) 2626 T AFI PM PM' PI

26. J. S. et al., PRL 59, 728 (1987) – orbitally nondegenerate; A. Klejnberg & J. S., PRB 57, 12 041 (1998) – degenerate.