t-J model then and now: A personal perspective from the pioneering times
Abstract
Description
In this overview I sketch briefly the path to the so-called {\em t-J model} derived for the first time 30 years ago and provide its original meaning within the theory of strongly correlated magnetic metals with a non-Fermi (non-Landau) liquid ground state. An emergence of the concept of {\em real space pairing}, is discussed in a historical prospective. A generalization of this model to the many-orbital situation is briefly discussed. The emphasis is put on didactical exposition of ideas, as they were transformed into mathematical language. The concept of {\em hybrid pairing} is introduced in the same context at the end.
14 pages without figures, lecture presented at the XII National School "Correlated Electrons Systems Then and Now", Ustron, Poland (September 2006)
14 pages without figures, lecture presented at the XII National School "Correlated Electrons Systems Then and Now", Ustron, Poland (September 2006)