Momentum distribution of helium and hydrogen in nanotubes

S. M. Gatica, M. W. Cole, G. Stan, J. M. Hartman, V. H. Crespi

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We compute the momentum distribution of helium atoms and hydrogen molecules absorbed within an ordered bundle of carbon nanotubes. The results vary significantly as a function of coverage and manifest the strong anisotropy and localization of this geometry. For example, the root-mean-square momentum component perpendicular to the bundle axis can be about three times larger for interstitial molecules than for molecules moving in an axial phase confined by a cylindrical film of particles coating the tube's inner wall. These results (which are consequences of the uncertainty principle) indicate that the momentum distribution is a useful signature of the local geometry and quantum state of the absorbed particles in nanotube bundles.

Original languageEnglish (US)
Pages (from-to)9989-9991
Number of pages3
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number15
StatePublished - Oct 15 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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