Ferroelectric materials, because of their robust spontaneous electrical polarization, are
widely used in various applications. Recent advances in modelling, synthesis and …

The flexoelectricity describes the contribution of the linear couplings between the electric
polarization and strain gradient and between polarization gradient and strain to the …

Flexoelectricity—the coupling between polarization and strain gradients—is a universal
effect allowed by symmetry in all materials. Following its discovery several decades ago …

The flexoelectric effect is the response of electric polarization to a mechanical strain
gradient. It can be viewed as a higher-order effect with respect to piezoelectricity, which is …

We introduce a new type of liquid cell for in situ transmission electron microscopy (TEM)
based on entrapment of a liquid film between layers of graphene. The graphene liquid cell …

Ferroelectric materials are characterized by a permanent electric dipole that can be reversed
through the application of an external voltage, but a strong intrinsic coupling between …

Strain engineering enables modification of the properties of thin films using the stress from
the substrates on which they are grown. Strain may be relaxed, however, and this can also …

One of the most tantalizing applications of piezoelectricity is to harvest energy from ambient
mechanical vibrations for powering micro and nano devices. However, piezoelectricity is …

We report on nanoscale strain gradients in ferroelectric HoMnO 3 epitaxial thin films,
resulting in a giant flexoelectric effect. Using grazing-incidence in-plane x-ray diffraction, we …

Piezoelectricity is inherent only in noncentrosymmetric materials, but a piezoelectric
response can also be obtained in centrosymmetric crystals if subjected to inhomogeneous …