Dresden 2017 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 8: Ferroics - Domains, Domain Walls and Skyrmions I
DF 8.5: Vortrag
Dienstag, 21. März 2017, 11:00–11:15, WIL B321
Giant charged-domain-wall conductivity in lithium-nioabte — •Simon J. Herr1, Christioph S. Werner1, Cina Razzaghi2, Elisabeth Soergel2, Boris Sturman3, Karsten Buse4, and Ingo Breunig1 — 1Department of Microsystems Engineering, University of Freiburg — 2University of Bonn, Bonn, Germany — 3Institute for Automation and Electrometry of Russian Academy of Science, Novosibirsk, Russia — 4Fraunhofer Institute for Physical Measurement Techniques, Freiburg, Germany
Charged-domain-walls in ferroelectric materials are known to show increased conductivity compared to the bulk-material. These domain-walls could play the key-role in a new type of electronic or electro-optic devices making use of the functional features of the host crystals. So far, the limiting factors are the high resistivity of the domain walls and the lack of a mechanism to create an ohmic interface to the domain-wall. Based on our method of calligraphic domain-inversion, we were able to create conducting domain-walls in lithium-niobate which show a highly increased conductivity, comparable to that of semiconductor materials. Further, we demonstrate that we can achieve diode-like behaviour as well as ohmic conduction.