title: Evidence for vortices in the pseudogap region of Y1-xPrxBa2Cu3O7 from angular magnetoresistivity measurements.
abstract: In-plane angular magnetoresistivity Deltarho(anis)(ab) measurements were made on Y(1-x)Pr(x)Ba(2)Cu(3)O(7-delta) single crystals in the pseudogap region. For x>/=0.2 single crystals, Deltarho(anis)(ab)(theta) displays a deviation from the typical quasiparticle contribution (proportional, sin((2)theta) for temperatures smaller than a certain value T(phi) in the pseudogap region. This deviation is consistent with a flux-flow type contribution to angular magnetoresistivity, indicating the presence of vortexlike excitations above the zero-field critical temperature in the pseudogap region.
authors.affiliation: Department of Physics, Kent State University, Kent, OH 44242, USA.
authors.forename: V
authors.initials: V
authors.lastname: Sandu
authors.forename: E
authors.initials: E
authors.lastname: Cimpoiasu
authors.forename: T
authors.initials: T
authors.lastname: Katuwal
authors.forename: Shi
authors.initials: S
authors.lastname: Li
authors.forename: M B
authors.initials: MB
authors.lastname: Maple
authors.forename: C C
authors.initials: CC
authors.lastname: Almasan