title: Superfluidity of 4He in one and three dimensions realized in nanopores.
abstract: Superfluidity in one and three dimensions has been studied for 4He fluid films adsorbed in nanopores which are straight channels and three-dimensionally connected pores, respectively. We observed the superfluid in one and three dimensions where thermal phonon wavelengths are much longer than the channel diameter and the period of the pore connection, respectively, and found that the superfluid onset depends on the pore connection. In the straight channels, the observed superfluid density disappears at a temperature far below the heat capacity anomaly of the Ginzburg-Landau transition, while in the pores connected in three dimension, the adsorbed 4He films show an evident three-dimensional transition where the superfluid onset occurs at the heat capacity peak.
authors.affiliation: Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Toda
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Hieda
authors.forename: Taku
authors.initials: T
authors.lastname: Matsushita
authors.forename: Nobuo
authors.initials: N
authors.lastname: Wada
authors.forename: Junko
authors.initials: J
authors.lastname: Taniguchi
authors.forename: Hiroki
authors.initials: H
authors.lastname: Ikegami
authors.forename: Shinji
authors.initials: S
authors.lastname: Inagaki
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Fukushima