Superfluidity of {sup 4}He in One and Three Dimensions Realized in Nanopores

Journal Article · Fri Dec 21 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.255301· OSTI ID:21024620

Toda, Ryo; Hieda, Mitsunori; Matsushita, Taku; Wada, Nobuo ^[1]; Taniguchi, Junko ^[2]; Ikegami, Hiroki ^[3]; Inagaki, Shinji; Fukushima, Yoshiaki ^[4]

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1. Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602 (Japan)
2. Department of Applied Physics and Chemistry, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585 (Japan)
3. Low Temperature Physics Laboratory, RIKEN - Institute of Physical and Chemical Research, Hirosawa 2-1, Wako, Saitama 351-0198 (Japan)
4. Toyota Central R and D Laboratories, Inc., Yokomichi, Nagakute, Aichi 480-1192 (Japan)

Superfluidity in one and three dimensions has been studied for {sup 4}He fluid films adsorbed in nanopores which are straight channels and three-dimensionally connected pores, respectively. We observed the superfluid in one and three dimensions where thermal phonon wavelengths are much longer than the channel diameter and the period of the pore connection, respectively, and found that the superfluid onset depends on the pore connection. In the straight channels, the observed superfluid density disappears at a temperature far below the heat capacity anomaly of the Ginzburg-Landau transition, while in the pores connected in three dimension, the adsorbed {sup 4}He films show an evident three-dimensional transition where the superfluid onset occurs at the heat capacity peak.

• OSTI ID: 21024620
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DENSITY
FILMS
GINZBURG-LANDAU THEORY
HELIUM 4
PHONONS
SPECIFIC HEAT
SUPERFLUIDITY
THREE-DIMENSIONAL CALCULATIONS
WAVELENGTHS