Specific heat of thin He-4 films on graphite

Article

关键词: NEUTRON-DIFFRACTION;    HELIUM ADSORPTION;    CAPACITY;    SUPERFLUIDITY;    PHASE;   

DOI  :  10.1103/PhysRevB.102.235436

来源: SCIE

【 摘 要 】

The specific heat of a two-layer He-4 film adsorbed on a graphite substrate is estimated as a function of temperature by quantum Monte Carlo simulations. The results are consistent with recent experimental obser- vations [S. Nakamura, K. Matsui, T. Matsui, and H. Fukuyama, Phys. Rev. B 94, 180501(R) (2016)] in that they broadly reproduce their most important features. However, neither the supersolid nor the superfluid hexatic phases, of which experimental data are claimed to be evidence, are observed. It is contended that heat capacity measurements alone may not be a good predictor of structural and superfluid transitions in this system, as their interpretation is often ambiguous.

【 授权许可】

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