title: Nanoscale molecular superfluidity of hydrogen.
abstract: We present a microscopic quantum theoretical analysis of the nanoscale superfluid properties of solvating clusters of para-H2 around the linear OCS molecule. Path-integral calculations with N=17 para-H2 molecules, constituting a full solvation shell, show the appearance of a significant superfluid response to rotation around the molecular axis at T=0.15 K. This low-temperature superfluid response is highly anisotropic and drops sharply as the temperature increases to T approximately 0.3 K. These calculations provide definitive theoretical evidence that an anisotropic superfluid state exists for molecular hydrogen in this microscopic solvation layer.
authors.affiliation: Department of Physics, Konkuk University, Seoul 143-701, Korea.
authors.forename: Yongkyung
authors.initials: Y
authors.lastname: Kwon
authors.forename: K Birgitta
authors.initials: KB
authors.lastname: Whaley