Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Structure and superfluidity of ⁴He films on plated graphite
Репозиторій DSpace/Manakin
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Structure and superfluidity of ⁴He films on plated graphite
Тема:
Квантовые жидкости и квантовые кpисталлы
Інший ID:
PACS: 67.70.+n, 67.40.Kh, 67.40.Pm
Посилання:
Structure and superfluidity of ⁴He films on plated graphite / J. Nyeki, R. Ray, G. Sheshin, V. Maidanov, V. Mikheev, B. Cowan and J. Saunders // Физика низких температур. — 1997. — Т. 23, № 5-6. — С. 515-526. — Бібліогр.: 36 назв. — англ.
Підтримка:
We thank Chris Lusher for help with the data acquisition system and Marcio Siqueira for suggestions and comments. We should also especially like to thank Р. Crowell, G. Mistura, Р. S. ЕЬеу, and О. Е. Vilches for useful advices and discussions.
Technical assistance was provided at varjous stages bу John Taylor, Tony Wilkinson and Alan Betts. This work was supported bу EPSRC (UК) and the Royal Society and partially supported bу ІNТAS program (project 94-3416).
Дата:
1997
Переглядів:
328
Завантажень:
224
Анотація:
The results of an experimental study using torsional oscillators of the superfluidity of ⁴He films adsorbed on hydrogen plated graphite are reported. The evolution of superfluidity with the growth of the film shows considerable structure arising from the atomic layering of the film. There is evidence that the superfluidity of a single fluid layer is strongly suppressed, possibly due to the influence of the periodic potential arising from the underlying solid layer. The behavior of two fluid layers is quite distinct, but shows similarities to that of thicker films on heterogeneous substrates; we suggest that the usual theory of the superfluidity of two-dimensional ⁴He should be extended to account for superfluid onset temperatures in such a film.
