A theoretical and crucial step forward to investigate the properties of real materials is the density-functional theory (DFT) and the local-density approximation (LDA). But LDA and it`s generalizations, such as general gradient approximation (GGA), fail for systems with strongly electronic correlation. Thus, the theoretical physicists have developed LDA+U and LDA+dynamic mean field theory (LDA+DMFT) to treat the strongly correlated electronic systems.
The main work of Liang is focused on explaining properties of materials by different theoretical methods, including LDA, LDA+U, and LDA+DMFT (according to the research requirements). He looks forward to the cooperation with experimental physicist as well.