Dynamical modes in hydrogen bonded ferroelectrics

The interaction between phonon vibrations and proton chemical bonding positions in hydrogen bonded ferroelectrics has been conventionally described by the formal spin de Gennes Hamiltonian. The line-shape for both the phonon oscillations and hydrogen tunneling oscillations have been theoretically analized via the coupled Green's function equations. Some unusual features of the resulting spectral functions have been verified in Raman light scattering experiments.