  Given the widespread use of density functional theory (DFT), there is an
increasing need for the ability to model large systems (beyond 1,000 atoms). We
present a brief overview of the large-scale DFT code Conquest, which is capable
of modelling such large systems, and discuss approaches to the generation of
consistent, well-converged pseudo-atomic basis sets which will allow such large
scale calculations. We present tests of these basis sets for a variety of
materials, comparing to fully converged plane wave results using the same
pseudopotentials and grids.
