EAM 2018 Plenary Speakers
Wednesday, January 17, 2018
8:40 a.m. – Orange D
Roger DeSouza, professor, RWTH Aachen University, Institut fuer Physikalische Chemie
Title: Using transport studies to reveal the myriad secrets of SrTiO3
There is renewed interest in electrical conduction in the perovskite oxide SrTiO3, driven by the material’s possible application in devices for all-oxide electronics and resistive switching. In my talk, I will briefly review, first, the defect chemistry of SrTiO3, and then, the thermodynamics of space-charge formation at extended defects. The main part of the talk will concentrate on understanding the electrical conductivity of single crystal, bicrystal and thin film samples of this prototypical perovskite-type oxide. In particular I will focus on the conductivity behavior of the bulk phase as a function of temperature (from room temperature up to ca. 700 °C), of bicrystal samples as a function of misorientation angle, and of thin-film samples as a function of film thickness. For all three cases I will demonstrate that it is possible to predict the electrical conductivity using thermodynamic models. Finally, I will describe the consequences for memresistive devices, and I will draw attention to current challenges and outstanding problems.
Thursday, January 18, 2018
8:40 a.m. – Orange D
Judith MacManus-Driscoll, professor, Department of Materials Science, University of Cambridge
Title: New materials paradigm in oxide epitaxial nanocomposite thin films and the realization of enhanced functionalities
Since the discovery of high temperature superconductivity in perovskite oxides in 1986, the unearthing of a huge range of physical phenomena in transition metal oxides (TMOs) has been nothing short of remarkable, e.g. new magnetics, ferroelectrics, multiferroics, semiconductors, transparent conductors, calorics, plasmonics, catalysts, ionic conductors. However, for a variety of reasons ranging from lack of perfection to complexity of processing, to the functional effect being too weak, there are few applications of complex oxide films today. This talk will discuss new insight into overcoming these challenges by using epitaxial nanocomposite films. Examples of our recent work on unprecedented functional property enhancements in ferroelectrics, ferromagnetics, magnetoelectrics and ionics will be given.