Projekt

Daten zum Projekt

Investigation of the domain wall conductivity in uniaxial ferroelectrics

Initiative: Trilaterale Partnerschaften – Kooperationsvorhaben zwischen Wissenschaftler(inne)n aus der Ukraine, Russland und Deutschland
Bewilligung: 29.02.2016
Laufzeit: 3 Jahre

Projektinformationen

The recently discovered ability to purposely write and erase nanoscopic conductive channels, the so-called charged domain walls (CDWs), across wide-bandgap and uniaxial ferroelectric LiNbO3 (LNO) single crystals, forms an emergent feature for novel nanoelectronic applications and devices. Such CDWs are exactly in the focus of the current project. The goal is to establish an in-depth understanding of those physicochemical parameters that allow increasing and tuning this conductivity along CDWs. Optimizing the charge transport thus needs a twofold approach, with (a) improving the electron-hopping rate along charged domain walls for instance by doping domain walls within these single crystals, as well as (b) lowering the injection barrier at the interface between DWs and surface electrodes. Both aspects will be investigated under systematic variation of defect and doping concentration. Furthermore, the impact of the applied poling method on the form and electronic transport properties of CDWs in LNO will be investigated. Lastly, the concept of creating time-stable CDWs will be extended also to other uniaxial ferroelectrics, such as LiTaO3 (LTO) and SrxBa1-xNb2O6 (SBN).

Projektbeteiligte

  • Prof. Dr. Lukas M. Eng

    Technische Universität Dresden
    Mathematik und Naturwissenschaften
    Institut für Angewandte Physik
    Hermann-Krone-Bau
    Dresden

  • Dr. Oleg Sevostyanov

    Kemerovo State University
    Physics Department
    Institute of Fundamental Sciences
    Kemerovo
    Russland

  • Prof. Liudmila Ivleva

    Russian Academy of Sciences
    A.M.Prokhorov General Physics Institute
    Moskau
    Russland

  • Dr. MIKHAIL Goulkov

    National Academy of Sciences of Ukraine
    Institute of Physics
    Kiev
    Ukraine

Open Access-Publikationen