Dynamic polaron tunneling in YBa2Cu3O7: Optical response and inelastic neutron scattering

Abstract
Coexisting electronic correlations and electron-phonon interactions have been proposed to lead to dynamic polaron-tunneling behavior for the axial oxygen in YBa2 Cu3 O7. Emphasizing nonlinear and nonadiabatic effects, we show that this description leads to distinctive predictions consistent with structural, optical, and inelastic neutron-scattering data in the axial direction.