Virginia TechWang, Yu. U.2014-02-112014-02-112006-09-18Wang, Yu U., Sep 2006. "Diffraction theory of nanotwin superlattices with low symmetry phase," PHYSICAL REVIEW B 74(10): 104109. DOI: 10.1103/PhysRevB.74.1041091098-0121http://hdl.handle.net/10919/25362A nanotwin diffraction theory is developed. It predicts an adaptive diffraction phenomenon, where the Bragg reflection peaks are determined by coherent superposition of scattered waves from individual twin-related nanocrystals and adaptively shift along the twin peak splitting vectors in response to a change in the twin variant volume fraction. Application of this theory to tetragonal phase explains the intrinsic lattice parameter relationships of monoclinic M-C phase recently discovered in ferroelectric Pb[(Mg1/3Nb2/3)(1-x)Ti-x]O-3 and Pb[(Zn1/3Nb2/3)(1-x)Ti-x]O-3.application/pdfen-USIn CopyrightMartensitic transformationsSystemsCrystalsPhysicsArticle - Refereedhttp://link.aps.org/doi/10.1103/PhysRevB.74.104109https://doi.org/10.1103/PhysRevB.74.104109