Shear Pleasure: The Structure, Formation, and Thermodynamics of Crystallographic Shear Phases
Albert A. Voskanyan, Alexandra Navrotsky
Abstract
A renaissance of interest in crystallographic shear structures and our recent work in this remarkable class of materials inspired this review. We first summarize the geometrical aspects of shear plane formation and possible transformations in ReO 3 , rutile, and perovskite-based structures. Then we provide a mechanistic overview of crystallographic shear formation, plane ordering, and propagation. Next we describe the energetics of planar defect formation and interaction, equilibria between point and extended defect structures, and thermodynamic stability of shear compounds. Finally, we emphasize the remaining challenges and propose future directions in this exciting area.
Topics & Concepts
Shear (geology)Materials sciencePlanarCrystal structureThermodynamicsCrystallographyChemistryPhysicsComposite materialComputer scienceComputer graphics (images)Thermal Expansion and Ionic ConductivityFerroelectric and Piezoelectric MaterialsInorganic Chemistry and Materials