  The Yang-Mills description of phonons and the consequent structure of
electron liquids in strongly anharmonic crystals such as metal oxides is shown
to yield an attractive electron-phonon interaction, and thus an instability
towards the formation of bound states, which can condense to form a
superconductor. This mechanism differs significantly from the pairing mechanism
of conventional superconductivity: the ground state from which
superconductivity emerges is a many-body state of paired electrons and holes
which is not amenable to a quasiparticle description, and whose properties are
similar to those seen in the Cuprate high temperature superconductors.
Confinement arises because the electron liquid structure acts as a source for
Yang-Mills bosons, and not the traditional longitudinal density waves of BCS
pairing.
