- Mohsen Abd-Elmeguid: Some Aspects of Strongly Correlated Electron Systems I
- 11. 5. 2016, 14:50
- lecture room F2, first floor Ke Karlovu 5
- more information
Abstract:
Strongly correlated electron systems (SCES) are materials where the interaction between electrons (Coulomb repulsion) is larger than the corresponding kinetic energy. This includes most of narrow band systems (d and f electrons) such as transition metal compounds with partially filled 3d orbitals as well as compounds with partially filled 4f (5f) orbitals. The existence of several competing ground (ordered) states that are sensitive to control parameters, e.g. doping, pressure, magnetic field results in novel properties of these unique materials. The 4 seminars on some aspects of strongly correlated electron systems will discuss the different physical aspects in this class of materials with a focus on transition metal compound and the related phenomena such as spin, charge, orbital order, Mott-Hubbard metal-insulator transition as well as topological insulators and nonstructural materials.
The first seminar will give a short but general overview of SCES and briefly discuss the origin of the strong electronic correlations. It will then be focused on the description of the metal-insulator transition by the Hubbard model with some examples.