Résumé
Based on a microscopic model of nonequilibrium carrier generation in a leaky
dielectric, we analytically derive hysteresis loops for the dielectric response
of non-polar, non-ferroelectric materials. We demonstrate how complex
dielectric responses can emerge solely from the influence of transport
processes that depend on energy levels, voltage polarity, and asymmetries in
charge transfer rates. By combining Electrochemical Impedance Spectroscopy and
voltammetry, we address critical questions related to the microscopic
mechanisms in poorly conductive systems dominated by displacement currents. The
impedance analysis, extended to higher-order harmonics, provides deeper
insights into the dynamic behavior of dielectric materials, emphasizing the
need to correlate impedance spectroscopy with dielectric spectroscopy for a
thorough understanding of dipole relaxation and transport phenomena. Our
approach provides a fully analytical framework that directly correlates
microscopic charge dynamics with macroscopic dielectric responses, offering
enhanced accuracy and predictive capability for systems dominated by
displacement currents.