  Frequency dependent dynamic electromechanical response of the mixed
ionic-electronic conductor film to a periodic electric bias is analyzed for
different electronic and ionic boundary conditions. Dynamic effects of mobile
ions concentration (stoichiometry contribution), charge state of acceptors
(donors), electron concentration (electron-phonon coupling via the deformation
potential) and flexoelectric effect contribution are discussed. A variety of
possible nonlinear dynamic electromechanical response of MIEC films including
quasi-elliptic curves, asymmetric hysteresis-like loops with pronounced memory
window and butterfly-like curves are calculated. The electromechanical response
of ionic semiconductor is predicted to be a powerful descriptor of local
valence states, band structure and electron-phonon correlations that can be
readily measured in the nanoscale volumes and in the presence of strong
electronic conductivity.
