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Quasi-one-dimensional 4He inside carbon nanotubes

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2000-01
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American Physical Society
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We report results of diffusion Monte Carlo calculations for both 4He absorbed in a narrow single walled carbon nanotube (R=3.42Å) 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 quasicontinuous liquid-solid phase transition is observed in both cases.
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Physical Review B - Condensed Matter and Materials Physics, 2000;61(2):R878-R881
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