title: Persistent photoconductivity in strained epitaxial BiFeO3 thin films.
abstract: A drastic change in the conductivity of strained BiFeO3 (BFO) films is observed after illuminating them with above-band gap light. This has been termed as persistent photoconductivity. The enhanced conductivity decays exponentially with time. A trapping character of the sub-band levels and their subsequent gradual emptying is proposed as a possible mechanism.
authors.affiliation: Max Planck Institute of Microstructure Physics , Weinberg 2, 06120 Halle, Germany.
authors.forename: Akash
authors.initials: A
authors.lastname: Bhatnagar
authors.forename: Young Heon
authors.initials: YH
authors.lastname: Kim
authors.forename: Dietrich
authors.initials: D
authors.lastname: Hesse
authors.forename: Marin
authors.initials: M
authors.lastname: Alexe
keywords: BiFeO3; enhanced conductivity; persistent photoconductivity; strain; thermally stimulated current