Bose-Einstein Condensation of Helium and Hydrogen inside Bundles of Carbon Nanotubes

Details Bose-Einstein Condensation of Helium and Hydrogen inside Bundles of Carbon Nanotubes Bose-Einstein Condensation of Helium and Hydrogen inside Bundles of Carbon Nanotubes

2003-10-03

arxiv.org/abs/cond-mat/0310067v1

Physics

Condensed Matter

Materials Science

21 pages, 9 figures

Scientific paper

10.1103/PhysRevB.70.165422

Helium atoms or hydrogen molecules are believed to be strongly bound within the interstitial channels (between three carbon nanotubes) within a bundle of many nanotubes. The effects on adsorption of a nonuniform distribution of tubes are evaluated. The energy of a single particle state is the sum of a discrete transverse energy Et (that depends on the radii of neighboring tubes) and a quasicontinuous energy Ez of relatively free motion parallel to the axis of the tubes. At low temperature, the particles occupy the lowest energy states, the focus of this study. The transverse energy attains a global minimum value (Et=Emin) for radii near Rmin=9.95 Ang. for H2 and 8.48 Ang.for He-4. The density of states N(E) near the lowest energy is found to vary linearly above this threshold value, i.e. N(E) is proportional to (E-Emin). As a result, there occurs a Bose-Einstein condensation of the molecules into the channel with the lowest transverse energy. The transition is characterized approximately as that of a four dimensional gas, neglecting the interactions between the adsorbed particles. The phenomenon is observable, in principle, from a singular heat capacity. The existence of this transition depends on the sample having a relatively broad distribution of radii values that include some near Rmin.

Affiliated with

Also associated with

No associations

Rating

Bose-Einstein Condensation of Helium and Hydrogen inside Bundles of Carbon Nanotubes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Bose-Einstein Condensation of Helium and Hydrogen inside Bundles of Carbon Nanotubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bose-Einstein Condensation of Helium and Hydrogen inside Bundles of Carbon Nanotubes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-570992