title: Defect-unbinding and the Bose-glass transition in layered superconductors.
abstract: The low-field Bose-glass transition temperature in heavy-ion irradiated Bi(2)Sr(2)CaCu(2)O(8+delta) increases progressively with increasing density n(d) of irradiation-induced columnar defects, but saturates for n(d) greater or = 1.5 x 10(9) cm(-2). The maximum Bose-glass temperature corresponds to that above which diffusion of two-dimensional pancake vortices between vortex lines becomes possible, and the "linelike" character of vortices is lost. We develop a description of the Bose-glass line that quantitatively describes experiments on crystals with widely different track densities and material parameters.
authors.affiliation: Laboratoire des Solides Irradiés, CNRS 7642 & CEA/DSM/DRECAM, Ecole Polytechnique, 91128 Palaiseau, France.
authors.forename: C J
authors.initials: CJ
authors.lastname: van der Beek
authors.forename: M
authors.initials: M
authors.lastname: Konczykowski
authors.forename: A V
authors.initials: AV
authors.lastname: Samoilov
authors.forename: N
authors.initials: N
authors.lastname: Chikumoto
authors.forename: S
authors.initials: S
authors.lastname: Bouffard
authors.forename: M V
authors.initials: MV
authors.lastname: Feigel'man