Scanning Probe Studies of Structural and Functional Properties of Ferroelectric Domains and Domain Walls
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Beschreibung
This thesis explores the fascinating properties of domain walls in ferroelectric materials. Domain walls can be used as model systems to study fundamental aspects of interface physics, such as crackling noise, with implications extending to a broad variety of systems, from material fracture and earthquakes to solar flares and collective decision making. Ferroelectric domain walls also show functional properties absent from the domains themselves, such as enhanced conduction leading to the tantalizing possibility of reconfigurable nanoelectronic circuitry where domain walls are active components. This work discusses the crackling physics of domain walls in thin films of Pb(Zr0.2Ti0.8)O3, as well as links between the local conductivity of domain walls and nanoscale geometrical distortions due to defects, and discusses unusual polarization textures with rotational components at crossings of ferroelastic twin domains. The results presented in this thesishave important implications for the experimental study of crackling systems.
This thesis explores the fascinating properties of domain walls in ferroelectric materials. Domain walls can be used as model systems to study fundamental aspects of interface physics, such as crackling noise, with implications extending to a broad variety of systems, from material fracture and earthquakes to solar flares and collective decision making. Ferroelectric domain walls also show functional properties absent from the domains themselves, such as enhanced conduction leading to the tantalizing possibility of reconfigurable nanoelectronic circuitry where domain walls are active components. This work discusses the crackling physics of domain walls in thin films of Pb(Zr0.2Ti0.8)O3, as well as links between the local conductivity of domain walls and nanoscale geometrical distortions due to defects, and discusses unusual polarization textures with rotational components at crossings of ferroelastic twin domains. The results presented in this thesishave important implications for the experimental study of crackling systems.
Nominated as an outstanding Ph.D. thesis by the University of Geneva, Geneva, Switzerland Explores the special properties of ferroelectric domain walls, along with their importance for studying fundamental aspects of interface physics Focuses on the crackling physics in thin films of Pb(Zr0.2Ti0.8)O3, with implications for the study of crackling systems in general
Autor*in
Philippe Tückmantel
Themen in »Scanning Probe Studies of Structural and Functional Properties of Ferroelectric Domains and Domain Walls«
Ferroelectricity Crackling Domain Walls Domain Wall Conduction Piezoresponse Force Microscopy