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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2008, Volume 87, Issue 11, Pages 743–746
(Mi jetpl135)
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This article is cited in 4 scientific papers (total in 4 papers)
CONDENSED MATTER
Observation of a superfluid phase in solid helium
I. V. Kalinina, E. Katsb, M. Kozab, V. V. Lauterc, H. Lauterb, A. V. Puchkova a Institute of Physics and Power Engineering, pl. Bondarenko 1, Obninsk, Kaluga region, 249033, Russia
b Institut Laue-Langevin, 38042 Grenoble, France
c Spallation Neutron Source, Oak Ridge National Laboratory, Tennessee 37831, USA
Abstract:
Evidence of a superfluid liquid phase present in polycrystalline helium at a temperature of 0.2 K and a pressure of 51 bar has been obtained by means of inelastic neutron scattering. The superfluid component is absent at a temperature of 0.6 K and the same pressure. Thus, a “solid helium-superfluid helium” phase transition has been discovered. The sample of solid helium in a porous medium (silica aerogel) has been prepared with the use of a capillary blocking technique. The shape of the structure factor of the superfluid phase indicates the presence of clusters or the effects of a restricted geometry. The results may be used to explain the nonclassical rotational inertia phenomenon in solid helium (often referred to as supersolidity, Nature, 2004).
Received: 06.05.2008
Citation:
I. V. Kalinin, E. Kats, M. Koza, V. V. Lauter, H. Lauter, A. V. Puchkov, “Observation of a superfluid phase in solid helium”, Pis'ma v Zh. Èksper. Teoret. Fiz., 87:11 (2008), 743–746; JETP Letters, 87:11 (2008), 645–648
Linking options:
https://www.mathnet.ru/eng/jetpl135 https://www.mathnet.ru/eng/jetpl/v87/i11/p743
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