Browsing NTNU Open by Author "Lunkenheimer, Peter"

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Conductivity Contrast and Tunneling Charge Transport in the Vortexlike Ferroelectric Domain Patterns of Multiferroic Hexagonal YMnO3

Ruff, E.; Krohns, S.; Lilienblum, M.; Meier, Dennis Gerhard; Fiebig, Manfred; Lunkenheimer, Peter; Loidl, Alois (Journal article, 2017)

We deduce the intrinsic conductivity properties of the ferroelectric domain walls around the topologically protected domain vortex cores in multiferroic YMnO3. This is achieved by performing a careful equivalent-circuit ...
Post-synthesis tuning of dielectric constant via ferroelectric domain wall engineering

Zhou, Lima; Puntigam, Lukas; Lunkenheimer, Peter; Bourret, Edith; Yan, Zewu; Kézsmárki, István; Meier, Dennis; Krohns, Stephan; Schultheiss, Jan Erich; Evans, Donald Malcolm (Peer reviewed; Journal article, 2024)

A promising mechanism for achieving colossal dielectric constants involves the use of insulating internal barrier layers, such as insulating domain walls in ferroelectrics. A key advantage of domain walls, compared to other ...