title: Quasiparticle scattering induced by charge doping of iron-pnictide superconductors probed by collective vortex pinning.
abstract: Charge doping of iron-pnictide superconductors leads to collective pinning of flux vortices, whereas isovalent doping does not. Moreover, flux pinning in the charge-doped compounds is consistently described by the mean-free path fluctuations introduced by the dopant atoms, allowing for the extraction of the elastic quasiparticle scattering rate. The absence of scattering by dopant atoms in isovalently doped BaFe2(As(1-x)P(x))(2) is consistent with the observation of a linear temperature dependence of the low-temperature penetration depth in this material.
authors.affiliation: Laboratoire des Solides Irradiés, CNRS UMR 7642 & CEA-DSM-IRAMIS, Ecole Polytechnique, Palaiseau, France.
authors.forename: Cornelis J
authors.initials: CJ
authors.lastname: van der Beek
authors.forename: Marcin
authors.initials: M
authors.lastname: Konczykowski
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kasahara
authors.forename: Takahito
authors.initials: T
authors.lastname: Terashima
authors.forename: Ryuji
authors.initials: R
authors.lastname: Okazaki
authors.forename: Takasada
authors.initials: T
authors.lastname: Shibauchi
authors.forename: Yuji
authors.initials: Y
authors.lastname: Matsuda