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Updated: Jul 11, 2026

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
Thinning of superfluid films below the critical point
Roya Zandi1, Aviva Shackell, Joseph Rudnick
1Department of Physics and Astronomy, University of California, Riverside, 900 University Avenue, Riverside, California 92521, USA.
Abstract:
Experiments on 4He films reveal an attractive Casimir-like force at the bulk lambda point and in the superfluid regime. Previous work has explained the magnitude of this force at the lambda transition and deep in the superfluid region but not the substantial attractive force immediately below the lambda point. Utilizing a simple mean-field calculation renormalized by critical fluctuations we obtain an effective Casimir force that is qualitatively consistent with the scaling function vartheta obtained by collapse of experimental data.
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