Berlin 2015 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 4: Focused Session on Ferroic Domain Walls I (DF with MA)

DF 4.1: Topical Talk

Montag, 16. März 2015, 15:00–15:30, EB 107

Domain walls and phase boundaries - new nanoscale functional elements in complex oxides — •Jan Seidel — School of Materials Science and Engineering, UNSW Australia, Sydney, Australia

Interfaces and topological boundaries in complex oxide materials, such as domain walls and morphotropic phase boundaries, have recently received increasing attention due to the fact that their properties, which are linked to the inherent order parameters of the material, its structure and symmetry, can be completely different from that of the bulk material [1]. I will present an overview of recent results on electronic and optical properties of ferroelectric phase boundaries, domain walls, and topological defects in multiferroic materials [2, 3, 4, 5, 6]. The origin and nature of the observed confined nanoscale properties is probed using a combination of nanoscale transport measurements based on scanning probe methods, high resolution transmission electron microscopy and first-principles density functional computations. I will also give an outlook on how these special properties can be found in other material systems and discuss possible future applications [7].
1. J. Seidel, et al., Nature Materials 8, 229 (2009) 2. J. Seidel, et al., J. Phys. Chem. Lett. 3, 2905 (2012) 3. J. Seidel, et al., Phase Trans. 86, 53 (2013) 4. J. Seidel, et al., Adv. Mater., 26, 4376 (2014) 5. Y. Heo, et al., Adv. Mater., DOI: 10.1002/adma.201401958 (2014) 6. K.-E. Kim, NPG Asia Mater. 6, e81 (2014) 7. G. Catalan, J. Seidel, R. Ramesh, and J. Scott, Rev. Mod. Phys. 84, 119 (2012)