If at first you don't succeed - add more dimensions
In this talk I will provide a brief introduction to different classes of incommensurate (or aperiodic) crystal structures, and the effect that the incommensuration has on their diffraction patterns. I will then introduce and describe the elegant methods that have been developed to determine and analyse the structures of such crystals. In particular, I will describe the superspace formalism where structures that are aperiodic in 3-dimensional space are envisaged to be periodic in an n-dimensional superspace where n=4,5,6. Examples from some of our recent results will be used to illustrate the methods.
This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..