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Ab initio study of surface stress response to charging

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arxiv cond-mat/0702441 v1 pith:ZHDGDIS4 submitted 2007-02-19 cond-mat.mtrl-sci

Ab initio study of surface stress response to charging

classification cond-mat.mtrl-sci
keywords surfaceresponsechangeschargingdensitystressanalysisapplication
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We explore an efficient way to numerically evaluate the response of the surface stress of a metal to changes in its superficial charge density by analysis of the strain-dependence of the work function of the uncharged surface. As an application we consider Au(111), (110) and (100) surfaces, employing density functional calculations. The sign of the calculated response parameter can be rationalized with the dependence of the surface dipole and the Fermi energy on strain. The numerical value falls within the range indicated by experiment. The magnitude can explain the experimentally observed volume changes of nanoporous materials upon charging.

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