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CAMP: Double perovskites - Magnetism and Topological phases

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Arun Paramekanti, University of Toronto
When
14 April 2015 from 3:30 PM to 4:30 PM
Where
339 Davey Laboratory
Contact Name
Jun Zhu
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There is great interest in studying strongly correlated materials which might

host topological phases or unusual magnetic states. We have been focussing on these

issues in a class of transition metal oxides called `double perovkites',

which host heavy transition metal (4d or 5d) ions with strong spin-orbit coupling. I

will explain why these materials are interesting, and discuss our theory work hinting at

their potential for engineering Chern bands and quantum anomalous Hall insulator phases

in thin film geometry. I  will also highlight our recent work showing unusual spin exchange

and magnetism in bulk Mott insulating variants, which allows for the study of strong

spin-orbit coupling in a canonical geometrically frustrated lattice, and present comparisons

with experimental data on certain iridium-based double perovskites.

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