Observation of a superfluid phase in solid helium

I. V. Kalinin; E. Kats; M. Koza; V. V. Lauter; H. Lauter; A. V. Puchkov

doi:10.1134/S0021364008110118

Observation of a superfluid phase in solid helium

I. V. Kalinin, E. Kats, M. Koza, V. V. Lauter, H. Lauter, A. V. Puchkov

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4 Scopus citations

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).

Original language	English
Pages (from-to)	645-648
Number of pages	4
Journal	JETP Letters
Volume	87
Issue number	11
DOIs	https://doi.org/10.1134/S0021364008110118
State	Published - Aug 2008
Externally published	Yes

Funding

The work was supported by the Russian Foundation for Basic Research together with the Kaluga Region Government (project no. 07-02-96401).

Funders	Funder number
Russian Foundation for Basic Research	07-02-96401

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10.1134/S0021364008110118

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title = "Observation of a superfluid phase in solid helium",

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).",

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T1 - Observation of a superfluid phase in solid helium

AU - Kalinin, I. V.

AU - Kats, E.

AU - Koza, M.

AU - Lauter, V. V.

AU - Lauter, H.

AU - Puchkov, A. V.

PY - 2008/8

Y1 - 2008/8

N2 - 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).

AB - 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).

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SP - 645

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Observation of a superfluid phase in solid helium

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