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University of Nebraska - Lincoln
Department of Physics and Astronomy: Dissertations, Theses, and Student Research
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Ferroelectric Polarization Dependent Interface Effects, Xiaohui Liu
Ferroelectric Polarization Dependent Interface Effects, Xiaohui Liu
Department of Physics and Astronomy: Dissertations, Theses, and Student Research
Utilization of the switchable spontaneous polarization of nanometer scale ferroelectric materials offers a promising avenue for future nanoelectronic devices. In this dissertation, we use density-functional calculations and phenomenological modeling to explore the effects of interface termination on thin-film heterostructures, the effects of electron doping in bulk ferroelectric materials on ferroelectric stability, and the effects of ferroelectric polarization switching on the electronic and transport properties of interfaces.
For SrRuO3/BaTiO3/SrRuO3 epitaxial heterostructures grown on SrTiO3, we find that the built-in dipole at the BaO/RuO2 terminated interface leads to a strong preference for one polarization. …