Phase diagram of He-4 adsorbed on graphite

Article

关键词: MONTE-CARLO-SIMULATION;    NEUTRON-DIFFRACTION;    HEAT-CAPACITY;    2ND LAYER;    SOLID HELIUM;    FILMS;    TRANSITION;    MONOLAYERS;    SUPERFLUIDITY;    SUBSTRATE;   

DOI  :  10.1103/PhysRevB.78.245414

来源: SCIE

【 摘 要 】

We present results of a theoretical study of He-4 films adsorbed on graphite based on the continuous space worm algorithm. In the first layer, we find a domain-wall phase and a (7/16) registered structure between the commensurate (1/3) and the incommensurate solid phases. For the second layer, we find only superfluid and incommensurate solid phases. The commensurate phase found in a previous simulation work is only observed if first-layer particles are kept fixed; it disappears upon explicitly including their zero-point fluctuations. No evidence of any supersolid phase is found.

【 授权许可】

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