Sohrab Ismail-Beigi 

November 19, 2013

Abstract:

The idea of these notes is to look at localized Hubbard-like models for electron correlation effects and see what one can do exactly (very little) and then more approximately within a mean-field approximation such as DFT or Hartree-Fock or the like. One of the main aims is to present background information as well as some derivations and explanations of the various outcomes that are used in DFT+U calculations. 

To download the article click on the link below:

http://volga.eng.yale.edu/sites/default/files/files/UJ-form-of-Vee.pdf