- Nothing amuses more harmlessly than computation and nothing is oftener applicable to real business or speculative enquiries. A thousand stories which the ignorant tell, and believe, die away at once, when the computist takes them in his grip.
- Samuel Johnson
CASTEP is a leading code for calculating the properties of materials from first principles. Using density functional theory, it can simulate a wide range of properties of materials proprieties including energetics, structure at the atomic level, vibrational properties, electronic response properties etc. In particular it has a wide range of spectroscopic features that link directly to experiment, such as infra-red and Raman spectroscopies, NMR, and core level spectra.
2014 Workshop in Oxford
The CASTEP developers will hold a hands-on workshop 18th-22nd August in Oxford. There will be a particular focus on Nuclear Magnetic Resonance (NMR) and vibrational (IR, Raman, INS) spectroscopies as well as Ab-initio Random Structure Searching (AIRSS). Workshop2014
Extraordinarily Long-Ranged Structural Relaxation in Defective Achiral Carbon Nanotubes CASTEP was used to investigate the structure of defects in carbon nanotubes. It was found that the results clearly demonstrate that the structural relaxation associated with reconstruction of an isolated monovacancy defect within a graphitic nanotube lattice can be extraordinarily long ranged (far longer than in any ‘conventional’ solid). As a result, it is likely that much published data derived from ab initio calculations of defective or functionalized carbon nanostructures to date have treated systems of insufficient size or with unphysical constraints (periodic boundary conditions) and therefore require careful evaluation. ref.