Calculation of the work function with a local basis set

Details Calculation of the work function with a local basis set Calculation of the work function with a local basis set

2006-11-08

arxiv.org/abs/cond-mat/0611216v1

Physics

Condensed Matter

Materials Science

to appear in Surf. Sci. Lett

Scientific paper

10.1016/j.susc.2006.10.025

Electronic structure codes usually allow to calculate the work function as a part of the theoretical description of surfaces and processes such as adsorption thereon. This requires a proper calculation of the electrostatic potential in all regions of space, which is apparently straightforward to achieve with plane wave basis sets, but more difficult with local basis sets. To overcome this, a relatively simple scheme is proposed to accurately compute the work function when a local basis set is used, by having some additional basis functions in the vacuum. Tests on various surfaces demonstrate that a very good agreement with experimental and other theoretical data can be achieved.

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