title: Helium in one-dimensional nanopores: free dispersion, localization, and commensurate/incommensurate transitions with nonrigid orbitals.
abstract: The single-particle states of helium within a bundle of carbon nanotubes can range from nearly free-particle dispersion to localization, even within a single bundle. At intermediate effective masses, the corrugation in the external potential can be comparable to the intrasite He-He hard-core interaction. This results in a commensurate/incommensurate transition, where the mobility of the doubly occupied domain-wall solitons at high density greatly exceeds the corresponding hole mobility below the transition.
authors.affiliation: Department of Physics, San Diego State University, San Diego, CA 92182, USA.
authors.forename: M
authors.initials: M
authors.lastname: Boninsegni
authors.forename: S Y
authors.initials: SY
authors.lastname: Lee
authors.forename: V H
authors.initials: VH
authors.lastname: Crespi