10.1063/1.3020526
Dasgupta, S.
S.
Dasgupta
Kruk, R.
R.
Kruk
Ebke, Daniel
Daniel
Ebke
Hütten, Andreas
Andreas
Hütten
Bansal, C.
C.
Bansal
Hahn, H.
H.
Hahn
Electric field induced reversible tuning of resistance of thin gold films
AMER INST PHYSICS
2008
2010-04-29T13:07:54Z
2018-07-24T12:57:51Z
journal_article
https://pub.uni-bielefeld.de/record/1636049
https://pub.uni-bielefeld.de/record/1636049.json
The change in resistance of nanostructured metals with respect to an applied field is believed to be due to a change in carrier concentration and hence a linear variation of resistance with the surface charge is expected. In this article, we propose a different approach to explain the resistance variation based on a change in the effective thickness of the film due to a shift of the electron density profile resulting from the applied surface charge. The change in effective thickness together with its effect on surface scattering of electrons account for the majority of the observed variation in resistance. The thin film geometry with different thicknesses and hence a controlled variation of the surface-to-volume ratio allows a deep quantitative understanding and interpretation of the observed phenomena. The model presented in this work shows that a nominal nonlinear response of the resistance of a metal on electrochemically applied surface charge does not necessarily indicate an onset of a redox reaction.