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Wetting studies of liquid 4He on various Cs surfaces

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Abstract

Cesium is a surface not wetted by liquid 4 He below a certain temperature, T w ≈ 2K. However, one observes that a thick helium film remains on the Cs substrate even if the surface is cooled below T w from the wetted state. This leaves the question how the system will finally evolve from this metastable state to the thermodynamic equilibrium, represented by a microscopically thin film. We investigate the dynamic and static behavioar of dewetting 4 He films on cesiated surfaces. Space and time resolved measurements of the thickness of the helium film are performed using a surface plasmon microscope. We have measured the work function of pure and oxidized Cs via photo current spectroscopy.

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Authors and Affiliations

  1. Fakultät für Physik, Universität Konstanz, Postfach 5560 M676, 78434, Konstanz, Germany

    Dietmar Reinelt, Jürgen Klier & Paul Leiderer

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  1. Dietmar Reinelt
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  2. Jürgen Klier
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  3. Paul Leiderer
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Reinelt, D., Klier, J. & Leiderer, P. Wetting studies of liquid 4He on various Cs surfaces. Journal of Low Temperature Physics 113, 805–810 (1998). https://doi.org/10.1023/A:1022586402420

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