Supersolidity in the second layer of para-H-2 adsorbed on graphite

Article

关键词: COMMENSURATE-INCOMMENSURATE TRANSITION;    HEAT-CAPACITY;    H-2;    SUPERFLUIDITY;    MONOLAYERS;    CLUSTERS;    PHASE;    ADSORPTION;    HD;   

DOI  :  10.1103/PhysRevB.105.094501

来源: SCIE

【 摘 要 】

We calculated the phase diagram of the second layer of para-H-2 adsorbed on graphite using quantum Monte Carlo methods. The second layer shows an incommensurate triangular crystal structure. By using a symmetric wave function, which makes possible molecule exchanges, we observed that this nearly two-dimensional crystal shows a finite superfluid density around a total density of 0.1650 angstrom(-2). The superfluid fraction of this supersolid phase was found to be small, (0.41 +/- 0.05)%, but still experimentally accessible.

【 授权许可】

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