The absence of asymptotic freedom in high temperature Mott insulators was discussed. It was found that the breakdown of strong coupling expansions failed for the high temperature superconductors because the value of the quasiparticle weight in the vicinity of half filling depended crucially on the presence of the upper Hubbard band. The absence of freedom of the doped Mott Insulators arose from quantum interference between electronic excitations across the Mott gap. The results show that the Pauli principle appeared as a sum rule over high and low energies in doped Mott systems.
ASJC Scopus subject areas
- Physics and Astronomy(all)