Morphological Instability of Phase Interface between Pyroelectric Domains

Morphological instability of a non-equilibrium ice–colloid interface

We assess the morphological stability of a non-equilibrium ice–colloidal suspension interface, and apply the theory to bentonite clay. An experimentally convenient scaling is employed that takes advantage of the vanishing segregation coefficient at low freezing velocities, and when anisotropic kinetic effects are included, the interface is shown to be unstable to travelling waves. The potential...

Morphological phase diagram for lipid membrane domains with entropic tension.

Circular domains in phase-separated lipid vesicles with symmetric leaflet composition commonly exhibit three stable morphologies: flat, dimpled, and budded. However, stable dimples (i.e., partially budded domains) present a puzzle since simple elastic theories of domain shape predict that only flat and spherical budded domains are mechanically stable in the absence of spontaneous curvature. We ...

Evaporatively driven morphological instability.

Simple observations of evaporating solutions reveal a complex hierarchy of spatiotemporal instabilities. We analyze one such instability suggested by the qualitative observations of Du and Stone and find that it is driven by a variant of the classical morphological instability in alloy solidification. In the latter case a moving solid-liquid interface is accompanied by a solutally enriched boun...

Impact of the Pyroelectric Effect on Ferroelectric Phase Transitions

Morphological instability during directional epitaxy

We consider the stability of a single step during epitaxial growth of a monolayer on a continuously supplied substrate in the presence of an imposed gradient in the deposition rate along the direction of growth. This allows control of instabilities that arise from asymmetries in the supply of atoms attaching from the upper and lower side of the step. We consider both a linear stability analysis...