Supersolidity in quantum films adsorbed on graphene and graphite
Other Condensed Matter
2015-05-27 v1
Abstract
Using quantum Monte Carlo we have studied the superfluid density of the first layer of He and H adsorbed on graphene and graphite. Our main focus has been on the equilibrium ground state of the system, which corresponds to a registered phase. The perfect solid phase of H shows no superfluid signal whereas He has a finite but small superfluid fraction (0.67%). The introduction of vacancies in the crystal makes the superfluidity increase, showing values as large as 14% in He without destroying the spatial solid order.
Keywords
Cite
@article{arxiv.1103.3583,
title = {Supersolidity in quantum films adsorbed on graphene and graphite},
author = {M. C. Gordillo and C. Cazorla and J. Boronat},
journal= {arXiv preprint arXiv:1103.3583},
year = {2015}
}
Comments
5 pages, accepted for publication in PRB