Berlin 2012 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 1: Focus Session: Conductive Domain Walls
DF 1.6: Topical Talk
Montag, 26. März 2012, 11:55–12:15, EB 107
Photoinduced electrical transport properties of LiNbO3 single crystals — •Andreas Thiessen1, Alexander Haußmann1, Mathias Schröder1, Theo Woike2, and Lukas M. Eng1 — 1Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden — 2Institute of Structural Physics of Condensed Matte, Technische Universität Dresden, D-01062 Dresden,Germany
Both the photo-induced electronic transport and the photovoltaic properties of domain walls (DWs) have triggered an increased interest in bulk and thin-film ferroic materials [1,2]. Technologically, the electronic behavior of domain walls in bulk LiNbO3 (LNO) single crystals are of special interest due to the availability of large-scale LNO wavers and the possibility of photolithographic domain wall engineering in these materials [3]. In the present work the transport properties of macroscopically contacted LNO were investigated. The temperature and illumination dependence of the electrical conductivity will be discussed, paying particular attention to the microscopic transport mechanisms and activation energies needed for transport within the domain wall regions.
[1] J. Seidel et al., Nat. Mater. 8, 229-234 (2009).
[2] J. Seidel et al., Phys. Rev. Lett. 107, 126805 (2011).
[3] A. Haußmann et al., Nano Lett. 9, 763-768 (2009).