Absence of superfluidity in a quasi-one-dimensional parahydrogen fluid adsorbed inside carbon nanotubes

Article

关键词: MANY-FERMION SYSTEM;    MOLECULAR-HYDROGEN;    VYCOR GLASS;    HE-4;    LOCALIZATION;    HELIUM;    MATRIX;    H-2;   

DOI  :  10.1103/PhysRevB.95.054517

来源: SCIE

【 摘 要 】

A recent claim of superfluid behavior of parahydrogen adsorbed inside armchair carbon nanotubes [M. Rossi and F. Ancilotto, Phys. Rev. B 94, 100502 (2016)] is disproven by means of first-principles computer simulations. Conclusive numerical evidence shows that the low-temperature equilibrium thermodynamic phase of parahydrogen adsorbed inside a (10,10) armchair nanotube features a crystalline shell adsorbed on the inner surface of the tube, and a well-separated quasi-one-dimensional central column showing no evidence of possible fluid or superfluid behavior. Rather, the system is quasicrystalline and nonsuperfluid; its physical character is qualitatively identical to that observed in similar confined settings extensively studied in the past. The incorrect prediction of superfluidity stems from the erroneous use of an effective one-dimensional interaction potential that does not describe parahydrogen at the center of the nanotube.

【 授权许可】

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