Anomalous low temperature specific heat of 3He inside nanotube bundles

S. M. Gatica, F. Ancilotto, M. W. Cole

Research output: Contribution to journalArticle

Abstract

Helium atoms and hydrogen molecules can be strongly bound inside interstitial channels within bundles of carbon nanotubes. An exploration of the low energy and low temperature properties of 3He atoms is presented here. Recent study of the analogous 4He system has shown that the effect of heterogeneity is to yield a density of states N (E) that is qualitatively different from the one-dimensional (1D) form of N(E) that would occur for an ideal set of identical channels. In particular, the functional form of N(E) is that of a 4D gas near the very lowest energies and a 2D gas at somewhat higher energies. Similar behavior is found here for 3He. The resulting thermodynamic behavior of this fermi system is computed, yielding an anomalous from of the heat capacity and its dependence on coverage.

Original languageEnglish (US)
Pages (from-to)179-189
Number of pages11
JournalJournal of Low Temperature Physics
Volume136
Issue number3-4
DOIs
StatePublished - Aug 1 2004

All Science Journal Classification (ASJC) codes

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

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