The University of Queensland
Department of Mathematics
Mathematical Physics Seminar
Quasicrystals: diffraction and shape
Peter Pleasants
The The University of Queensland
Thursday, May 16, 1pm
Room 641, Priestley (Mathematics) Building
Note: This week's seminar is a continuation of the presentation given last week. It will start with the section on diffraction patterns.
I shall talk about two aspects of quasicrystals of physical significance. The first is diffraction, which can be approached theoretically via the "cut and project" construction and Fourier transforms. I shall compare and contrast the diffraction patterns of crystals and quasicrystals and mention some non- quasicrystal structures that have quasicrystal- type diffraction. The second aspect is the existence of dense layers of atoms which can be expected to contribute to surface shape. I shall describe recent work on the existence of such layers and calculations of their densities and discuss how it fits with the physical evidence.
All interested are invited to attend.
Enquires to Yao-Zhong Zhang on 3365 2309 or yzz@maths.uq.edu.au