Superfluidity of ⁴He confined in nanoporous media
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Superfluidity of ⁴He confined in nanoporous media
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| Creator |
Shirahama, K.
Yamamoto, K. Shibayama, Y. |
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| Subject |
Жидкий гелий
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| Description |
We have examined superfluid properties of ⁴He confined to a nanoporous Gelsil glass that has nanopores 2.5 nm in diameter. The pressure–temperature phase diagram was determined by torsional oscillator, heat capacity and pressure studies. The superfluid transition temperature Tc approaches zero at 3.4 MPa, indicating a novel quantum superfluid transition. By heat capacity measurements, the nonsuperfluid phase adjacent to the superfluid and solid phases is identified to be a nanometer-scale, localized Bose condensation state, in which global phase coherence is destroyed. At high pressures, the superfluid density has a T-linear term, and Tc is proportional to the zero-temperature superfluid density. These results strongly suggest that phase fluctuations in the superfluid order parameter play a dominant role on the phase diagram and superfluid properties. |
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| Date |
2017-05-18T10:26:00Z
2017-05-18T10:26:00Z 2008 |
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| Type |
Article
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| Identifier |
Superfluidity of ⁴He confined in nanoporous media / K. Shirahama, K. Yamamoto, Y. Shibayama // Физика низких температур. — 2008. — Т. 34, № 4-5. — С. 350–356. — Бібліогр.: 30 назв. — англ.
0132-6414 PACS: 67.25.D–;81.07.–b http://dspace.nbuv.gov.ua/handle/123456789/116915 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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