Piezoelectric Negative Capacitance

摘要: A thermodynamic model was constructed to analyze the negative capacitance effect in presence of piezoelectricity. The demonstrated that while piezoelectricity can lead principle, it is not strong enough practice due unphysical amounts charge and strain required. inclusion higher-order electromechanical coupling such as electrostriction make region accessible at a lower amount charge. However, required strains are still on order tens percent. Furthermore, material must possess coefficient, or else will be suppressed by positive electrostriction. Most commonly used oxides, however, coefficients. Finally, piezoelectricity, electrostriction, ferroelectricity were analyzed together show occurs but ultimately demonstrates for all practical purposes, pure provide effect.