15-20 June 2014
Laurentian University / Université Laurentienne
America/Toronto timezone
Welcome to the 2014 CAP Congress! / Bienvenue au congrès de l'ACP 2014!

**WITHDRAWN** Spin-orbit coupled double perovskite bilayers: Magnetism, Chern bands, and quantum anomalous Hall insulators on the honeycomb lattice

19 Jun 2014, 09:15
C-204 (Laurentian University / Université Laurentienne)


Laurentian University / Université Laurentienne

Sudbury, Ontario
Oral (Student, In Competition) / Orale (Étudiant(e), inscrit à la compétition) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) (R1-5) Computational Materials Mini-symposium I - DCMMP-DMBP / Mini-symposium sur les matériaux numériques I - DPMCM-DPMB


Ms Ashley Cook (University of Toronto)


Spectacular experiments have demonstrated the controlled layer-by-layer growth of oxide heterostructures. This leads to the exciting prospect of tuning magnetism and topological states of correlated electrons in low dimensions. Here, we model $\{111\}$-grown bilayers of spin-orbit coupled double perovskites such as Sr$_2$FeMoO$_6$, showing that these buckled honeycomb materials act as half-metallic ferrimagnetic films. The combination of inter-orbital hybridization and symmetry-allowed trigonal distortion leads to a rich phase diagram with tunable magnetization directions, topological $C\!=\! \pm 1, \pm 2$ Chern bands, and a $C=\pm 2$ quantum anomalous Hall insulator regime. An effective two-band model of Zeeman-split $j\!=\! 3/2$ states captures this emergence of $C=\pm 2$ band topology.

Primary author

Ms Ashley Cook (University of Toronto)


Prof. Arun Paramekanti (University of Toronto, Canadian Institute for Advanced Research)

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