Correlation-enhanced electron-phonon interaction in a strongly correlated electron system

A NUMERICAL RENORMALIZATION GROUP APPROACH FOR AN ELECTRON-PHONON INTERACTION

A finite chain calculation in terms of Hubbard X-operators is explored by setting up a vibronic Harniltonian. The model conveniently transformed into a form so that in the case of strong coupling a numerical renormalization group approach is applicable. To test the technique, a one particle Green function is calculated for the model Harniltonian

STRONGLY CORRELATED ELECTRONS IN SOLIDS - II Superconductivity and electron-phonon interaction

Figure 3: Spatial representation of a Cooper pair. The lattice distortions shown by pink and green shadings have been produced by the electrons at r2and r1 respectively and trap the electrons with opposite spins in a singlet state. So far we have seen that the original properties of electronic matter are mostly governed by the magnitude of the Coulomb repulsion between electrons which is essent...

Strongly correlated electron systems.

Strongly correlated electron systems.

a numerical renormalization group approach for an electron-phonon interaction

a finite chain calculation in terms of hubbard x-operators is explored by setting up a vibronic harniltonian. the model conveniently transformed into a form so that in the case of strong coupling a numerical renormalization group approach is applicable. to test the technique, a one particle green function is calculated for the model harniltonian