Tuning the wetting transition: Prewetting and superfluidity ofon thin cesium substrates
- 12 July 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 71 (2) , 263-266
- https://doi.org/10.1103/physrevlett.71.263
Abstract
We have deposited cesium with monolayer thickness resolution on to the surfaces of a low-temperature quartz microbalance. By controlling the cesium thickness in the range from 1 to 25 monolayers, we have been able to continuously tune the substrate adsorption potential and observe its effect on the prewetting phase diagram. The wetting temperature can be conveniently adjusted in the range between 1 and 2 K. Features in both the frequency shift and the dissipation of the microbalance were used to map out the superfluid-normal boundary in the prewetting phase diagram. The transition from thin normal to thick superfluid occurs without the dissipation peak characteristic of a Kosterlitz-Thouless transition.
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