Torsional oscillator and synchrotron X-Ray experiments on solid 4He in aerogel.

Mulders, N; West, J T; Chan, M H W; Kodituwakku, C N; Burns, C A; Lurio, L B

Mulders, N; West, J T; Chan, M H W; Kodituwakku, C N; Burns, C A; Lurio, L B.

Afiliación

Mulders N; Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA.

Phys Rev Lett ; 101(16): 165303, 2008 Oct 17.

Article en En | MEDLINE | ID: mdl-18999682

RESUMEN

X-ray diffraction experiments show that solid 4He grown in aerogel is highly polycrystalline, with an hcp crystal structure (as in bulk) and a crystallite size of approximately 100 nm. In contrast to the expectation that the highly disordered solid will have a large supersolid fraction, torsional oscillator measurements show a behavior that is strikingly similar to high purity crystals grown from the superfluid phase. The low temperature supersolid fraction is only approximately 3 x 10(-4), and the onset temperature is approximately 100 mK.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2008 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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