title: Mesoscopic Free Path of Nonthermalized Photogenerated Carriers in a Ferroelectric Insulator.
abstract: We show how finite-size scaling of a bulk photovoltaic effect-generated electric field in epitaxial ferroelectric insulating BaTiO_{3}(001) films and a photo-Hall response involving the bulk photovoltaic current reveal a large room-temperature mean free path of photogenerated nonthermalized electrons. Experimental determination of mesoscopic ballistic optically generated carrier transport opens a new paradigm for hot electron-based solar energy conversion, and for facile control of ballistic transport distinct from existing low-dimensional semiconductor interfaces, surfaces, layers, or other structures.
authors.affiliation: Department of Electrical and Computer Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Zongquan
authors.initials: Z
authors.lastname: Gu
authors.affiliation: Department of Electrical and Computer Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Dominic
authors.initials: D
authors.lastname: Imbrenda
authors.affiliation: Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Andrew L
authors.initials: AL
authors.lastname: Bennett-Jackson
authors.affiliation: Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Matthias
authors.initials: M
authors.lastname: Falmbigl
authors.affiliation: Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Adrian
authors.initials: A
authors.lastname: Podpirka
authors.affiliation: U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, USA.
authors.forename: Thomas C
authors.initials: TC
authors.lastname: Parker
authors.affiliation: U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Shreiber
authors.affiliation: U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, USA.
authors.forename: Mathew P
authors.initials: MP
authors.lastname: Ivill
authors.affiliation: Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninsky Prospect 59, Moscow 117333, Russian Federation.
authors.forename: Vladimir M
authors.initials: VM
authors.lastname: Fridkin
authors.affiliation: Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Jonathan E
authors.initials: JE
authors.lastname: Spanier