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DF: Fachverband Dielektrische Festkörper

DF 8: Ferroics - Domains, Domain Walls and Skyrmions I

DF 8.9: Vortrag

Dienstag, 21. März 2017, 12:15–12:30, WIL B321

Electric conduction and dynamics of ferroelectric domain walls in SrTiO₃ — •Haijiao Harsan Ma, Daniel Kohlberger, Matthias Lange, Sebastian Scharinger, Reinhold Kleiner, and Dieter Koelle — Physikalisches Institut and Center for Quantum Science (CQ) in LISA⁺, Universität Tübingen, Germany

Domain walls in SrTiO₃ could play a significant role in future oxide electronics, given their small size at the nanoscale as well as the fact that their occurrence can be controlled by an external electric field. Here, we report on the low-temperature electric conductance properties of domain walls in SrTiO₃ and their response to an external electric field. These properties are probed by using a combination of low-temperature scanning electron microscopy, polarized light microscopy and electric transport measurements. Our measurements show that above the threshold electric field ∼ 1 kV/cm for field-induced electric order [1], the domain walls show strongly increased conductance as compared to the bulk SrTiO₃. We will also address observations of complex dynamic behavior of the domain wall conductance properties.

[1] H. J. Harsan Ma et al., Phys. Rev. Lett. 116, 257601 (2016).