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Preliminary Heat-Capacity Measurements of 2D Solid 3He Adsorbed on Graphite Preplated with 4He

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Abstract

We describe preliminary resugts of heat capacity measurements of the 4/7 phase in two dimensional 3He adsorbed on graphite preplated with a 4He monolayer in a temperature range between 0.17 and 20 mK. In zero magnetic field, we observed a double-peak structure similar to that reported previously for the same phase in a different system (3He/3He/gr) in which the gapless quantum spin-liquid ground state is proposed. The exchange interaction deduced from the high temperature data is by a factor of 30% smaller than the previous one, presumably because of the smaller lattice constant for the 3He/4He/gr system. The present resugt provides strong evidence that such a peculiar temperature dependence of heat capacity is characteristic of the 4/7 phase. Application of magnetic fields up to 0.65 T on this phase does not seem to change appreciably the higher temperature broad peak at around 1.4 mK.

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Authors and Affiliations

  1. Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan

    Y. Matsumoto, S. Murakawa, D. Tsuji, H. Kambara & Hiroshi Fukuyama

  2. CNRS-CRTBT, 25 Avenue des Martyrs, 38042, Grenoble, France

    C. Bäuerle

Authors
  1. Y. Matsumoto
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  2. S. Murakawa
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  3. D. Tsuji
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  4. C. Bäuerle
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  5. H. Kambara
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  6. Hiroshi Fukuyama
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Matsumoto, Y., Murakawa, S., Tsuji, D. et al. Preliminary Heat-Capacity Measurements of 2D Solid 3He Adsorbed on Graphite Preplated with 4He. Journal of Low Temperature Physics 134, 61–66 (2004). https://doi.org/10.1023/B:JOLT.0000012535.73760.b1

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  • DOI: https://doi.org/10.1023/B:JOLT.0000012535.73760.b1

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