Casimir force calculations near the insulator-conductor transition in gold thin films

Details Casimir force calculations near the insulator-conductor transition in gold thin films Casimir force calculations near the insulator-conductor transition in gold thin films

2008-03-24

arxiv.org/abs/0803.3478v1

Physics

Quantum Physics

5 figures, 1 table

Scientific paper

10.1103/PhysRevA.77.042107

We present theoretical calculations of the Casimir force for Au thin films near the insulator-conductor transition that has been observed experimentally. The dielectric function of the Au thin films is described by the Drude-Smith model. The parameters needed to model the dielectric function such as the relaxation time, plasma frequency and the backscattering constant depend on the thickness of the film. The Casimir force decreases as the film thickness decreases until it reaches a minimum after which the force increases again. The minimum of the force coincides with the critical film thickness where a percolation conductor-insulator occurs.

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