Bulletin of the American Physical Society
APS March Meeting 2013
Volume 58, Number 1
Monday–Friday, March 18–22, 2013; Baltimore, Maryland
Session A12: Focus Session: Complex Oxide Interfaces - Nickelates
8:00 AM–11:00 AM,
Monday, March 18, 2013
Sponsoring Unit: DMP
Chair: Prasana Balachandran, Drexel University
Abstract ID: BAPS.2013.MAR.A12.4
Abstract: A12.00004 : Topological phases in complex oxide interfaces and heterostructures*
8:36 AM–9:12 AM
Gregory A. Fiete
(University of Texas at Austin)
In this talk we highlight recent theoretical work from our group aimed at identifying complex oxide interfaces and heterostructures that are expected to support topological phases, namely the $Z_2$ time-reversal invariant topological insulator and the zero magnetic field Chern insulator, or quantum anomalous Hall state. We focus on two particular systems: (1) Perovskites of the form ABO$_3$ and (2) Pyrochlores of the form A$_2$B$_2$O$_7$ where A is usually a rare earth element and B is a transition metal element. One of our main results is that thin film growth along the  direction is favorable for the realization of topological phases in experiment. We lay out the most important film properties that appear to favor topological phases and discuss the different physics associated with realizing topological phases in 3d, 4d, and the heaviest 5d-based transition metal oxide systems. Key open questions and experimental challenges are presented, as well as the potential advantages that oxide systems offer over the Bi-based topological insulator material class in device applications.
*Work done in collaboration with Andreas Ruegg, Xiang Hu, Chandrima Mitra, and Alex Demkov. We gratefully acknowledge financial support from grants ARO W911NF-09-1-0527 and NSF DMR-0955778.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2013.MAR.A12.4
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