title: Electron emission from ferroelectric thin films enhanced by the presence of 90 degree ferroelectric domains.
abstract: In this work, a ferroelectric domain-enhanced electron emission mechanism is proposed. The polarization distribution near 90 degrees domain walls is calculated by solving a set of second order differential equations, including the Poisson's one and equations derived from an expansion of the free energy Phi(P) in power series of the polarization according to the Devonshire-Landau-Ginzburg theory. Domain walls intersecting the emitting surface cause sufficient electric fields and lower the potential barrier for electron emission. This induces centers of enhanced electron emission. Relaxing domain walls were found to excite trapped excess electrons in front of the wall.
authors.affiliation: Solid State Electronics Lab, Technische Universität Dresden, Dresden, Germany. Gunnar.Suchaneck@tu-dresden.de
authors.forename: Gunnar
authors.initials: G
authors.lastname: Suchaneck
authors.forename: Vinay S
authors.initials: VS
authors.lastname: Vidyarthi
authors.forename: Gerald
authors.initials: G
authors.lastname: Gerlach
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Solnyshkin
authors.forename: Inna L
authors.initials: IL
authors.lastname: Kislova
mesh_terms: D016880:Anisotropy; D003198:Computer Simulation; D004553:Electric Conductivity; D004579:Electron Transport; D007854:Lead / Q000737:chemistry*; D008567:Membranes, Artificial; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D014025:Titanium / Q000737:chemistry*
chemical_list: D008567:Membranes, Artificial; C481719:lead titanate; D007854:Lead; D014025:Titanium