Quasi one dimensional 4He inside carbon nanotubes
Abstract
We report results of diffusion Monte Carlo calculations for both 4He absorbed in a narrow single walled carbon nanotube (R = 3.42 ) and strictly one dimensional 4He. Inside the tube, the binding energy of liquid 4He is approximately three times larger than on planar graphite. At low linear densities, 4He in a nanotube is an experimental realization of a one-dimensional quantum fluid. However, when the density increases the structural and energetic properties of both systems differ. At high density, a quasi-continuous liquid-solid phase transition is observed in both cases.
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