(111)-Oriented vs. (001)-Oriented Perovskite Oxides: Effect of Crystalline Symmetry

Speaker: Thomas Tybell
Affiliation: Norwegian University of Science and Technology

Abstract:  Perovskite oxides are technologically interesting because of their strong structure property coupling, with interesting functional properties ranging from ferromagnetism, ferroelectricity to high-temperature superconductivity. Here I will give an overview of our work on synthesis of atomically smooth (111)-oriented oxides and discuss the effect of crystalline symmetry on the physical properties of ferroic oxides. Of special interest are structural effects at epitaxial interfaces promoting novel functional properties, and we will discuss how the interplay between electronic correlations and structural reconstructions can result in emerging functional phases. The effect of phonon-structure due to epitaxial strain will be assessed, with special focus on the effective thickness of an epitaxial interface having impact on the possibilities to rely on the trigonal symmetry of (111)-oriented oxides to realize honeycomb-physic systems and integration with 2D materials.

Biography:  Professor Tybell has ~15 years of experience in oxide electronics materials science, and co-founder of the oxide electronics group at NTNU. He focuses on synthesis and nanostructuring of epitaxial complex oxide thin heterostructures and superlattices. Present research includes interface engineering of ferroelectric and magnetic systems, and the possibility for symmetry engineering of functional properties. Parallel to research he has devoted effort to teaching and administration, and has had the responsibility to direct and develop a cross-disciplinary nanotechnology effort at NTNU, and developed a new 5-year curriculum for the MSc study program within electronic systems design and innovation at NTNU. Currently, he is deputy director of Department of Electronics and Telecommunications with responsibility for research.

For more information, contact Prof. K. Wang ()

Date(s) - Nov 23, 2016
11:00 am - 12:00 pm

E-IV Faraday Room #67-124
420 Westwood Plaza - 6th Flr., Los Angeles CA 90095