Strong correlations in two-dimensional quantum fluids of {sup 4}He and {sup 3}He adsorbed on hectorite

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00753329· OSTI ID:183399

Wada, Nobuo; Yano, Hideo ^[1]

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1. Univ. of Tokyo (Japan)

Quantum fluids, of {sub 4}He and{sup 3}He adsorbed on mesopores of Hectorite were studied by measuring the heat capacity down to 50mK. Phonon and roton-like heat capacities of the two-dimensional (2D) superfluid were observed as a function of the coverage. Comparisons with model calculations suggest a strong correlation between the adatoms of which an effective hard core diameter is 4-6{angstrom}. At the coverage and temperatures corresponding to the superfluid the{sup 3}He adatoms show a large nuclear heat capacity probably due to a Fermi degeneracy. The temperature-linear region the{sup 3}He heat capacity is likely to be much lower than that expected for an ideal Fermi gas. Assuming a 2D Fermi liquid, the effective mass at the coverage of about 2 layers is estimated to be 2.5 times that of the{sup 3}He atom.

• OSTI ID: 183399
• Report Number(s): CONF-950676--
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 101; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ADSORPTION
HELIUM 3
HELIUM 4
MONTMORILLONITE
SPECIFIC HEAT
SUPERFLUIDITY
TEMPERATURE DEPENDENCE