Quantum states and specific heat of low-density He gas adsorbed within the carbon nanotube interstitial channels: Band structure effects and potential dependence

Abstract

We calculate the energy-band structure of a He atom trapped within the interstitial channel between close-packed nanotubes within a bundle and its influence on the specific heat of the adsorbed gas. A robust prediction of our calculations is that the contribution of the low-density adsorbed gas to the specific heat of the nanotube material shows pronounced nonmonotonic variations with temperature. These variations are shown to be closely related to the band gaps in the adsorbate density of states.

Cited by in corpus (7)

• Adsorption of He atoms in external grooves of single wall carbon nanotube bundles
• Phonons and specific heat of linear dense phases of atoms physisorbed in the grooves of carbon nanotube bundles
• The heat capacity of nitrogen chains in grooves of single-walled carbon nanotube bundles
• Quantum virial expansion approach to thermodynamics of ${}^4$He adsorbates in carbon nanotube materials: Interacting Bose gas in one dimension
• Coating the carbon nanotubes: Geometry of incommensurate long-range ordered physisorbed monolayers
• Quantum phenomena in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 3He. A giant isotope effect
• Specific heats of dilute neon inside long single-walled carbon nanotube and related problems