NDLI: Optical Observations of Disorder in Solid Helium 4

Content Provider	Springer Nature Link
Author	Sasaki, Satoshi Caupin, Frédéric Balibar, Sébastien
Copyright Year	2008
Abstract	It has been proposed that the supersolidity of helium 4 is associated with disorder in the solid samples. We report optical observations of this disorder in samples grown by different methods. We show that, when grown by the “blocked capillary method” as in most experiments showing anomalous phenomena, solid helium 4 can be polycrystalline with grain sizes down to the micrometer range, much smaller than the 0.1 mm found in some other experiments.We analyze the properties of grain boundaries, and in particular the existence of liquid channels at the contact of grain boundaries with walls. Our analysis includes measurements of the contact angle of the liquid-solid interface with these walls, which exhibits a large hysteresis. Furthermore, we predict that similar channels should exist at the junction between grain boundaries.
Starting Page	43
Ending Page	76
Page Count	34
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	153
Issue Number	3-4
e-ISSN	15737357
Language	English
Publisher	Springer US
Publisher Date	2008-10-15
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Supersolids Crystal growth Disorder, Grain boundaries Superfluid helium 4 Droplets, films, interfaces and wetting Quantum solids Grain and twin boundaries Liquid-solid interfaces; growth kinetics Superfluidity in solid 4He, supersolid 4He Wetting Transport, hydrodynamics, and superflow Magnetism, Magnetic Materials Characterization and Evaluation of Materials Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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