Critical Point Coupling and Proximity Effects inHe4at the Superfluid Transition
نویسندگان
چکیده
منابع مشابه
Giant Proximity Effect and Coupling in Superfluid
Previous measurements of the specific heat of helium-4 (4He) confined in all three spatial dimensions suggested a coupling between neighbor ing confinements through the tiny channels used to fill them [1]. Measurements of the superfluid fraction in the filling channels also suggested an enhancement attributed to their proximity to the larger regions of superfluid [1]. Recent measurements of con...
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Figure 2: Confinements. An scanning electron microscope image of (2 μm)3 boxes etched out of thermally grown silicon oxide. These boxes are filled with liquid helium creating an extremely well defined array of uniform confinements. Figure 1: Confinement Cell. A diagram (not to scale) of a cell used to confine liquid helium. This consists of an array of (2 μm)3 boxes etched in a thermally grown ...
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15 صفحه اولThinning of superfluid films below the critical point.
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 ob...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2012
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.109.035302