Supersolidity in the second layer of -H adsorbed on graphite
arXiv:2203.03236 · doi:10.1103/PhysRevB.105.094501
Abstract
We calculated the phase diagram of the second layer of -H adsorbed on graphite using quantum Monte Carlo methods. The second layer shows an incommensurate triangular crystal structure. By using a symmetric wave function, that makes possible molecule exchanges, we observed that this nearly two-dimensional crystal shows a finite superfluid density around a total density of 0.1650 Å. The superfluid fraction of this supersolid phase was found to be small, 0.410.05 \%, but still experimentally accessible.
arXiv comment6 pages
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