Preliminary heat-capacity measurements of 2D solid 3He adsorbed on graphite preplated with 4He

Yosuke Matsumoto, S. Murakawa, D. Tsuji, C. Bäuerle, H. Kambara, Hiroshi Fukuyama

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We describe preliminary results 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 (3 He/3 He/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 result 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.

Original languageEnglish
Pages (from-to)61-66
Number of pages6
JournalJournal of Low Temperature Physics
Issue number1-2
Publication statusPublished - 2004 Jan

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics


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