Commensurate-incommensurate transition of 4He adsorbed on a single C60 molecule

摘要: Path-integral Monte Carlo calculations have been performed to study 4He adsorption on a single C60 molecule. Helium corrugations the fullerene molecular surface are incorporated with 4He-C60 interaction described by sum of all 4He-C interatomic pair potentials. Radial density distributions show layer-by-layer growth first adlayer being located at distance ∼6.3 A from center The monolayer shows different quantum states as number adatoms N varies. For = 32, we find commensurate solid, each 32 sites occupied atom. Various domain-wall structures observed more atoms added and layer crystallizes into an incommensurate solid when it is completely filled. This commensurate-incommensurate transition helium found be accompanied re-entrant superfluid response low temperature 0.31 K superfluidity totall...