PIRSA:14020116

Tuning magnetism and Chern bands in spin-orbit coupled double perovskites

Paramekanti, A. (2014). Tuning magnetism and Chern bands in spin-orbit coupled double perovskites. Perimeter Institute. https://pirsa.org/14020116

Paramekanti, Arun. Tuning magnetism and Chern bands in spin-orbit coupled double perovskites. Perimeter Institute, Feb. 11, 2014, https://pirsa.org/14020116 

          @misc{ pirsa_PIRSA:14020116,
            doi = {10.48660/14020116},
            url = {https://pirsa.org/14020116},
            author = {Paramekanti, Arun},
            keywords = {},
            language = {en},
            title = {Tuning magnetism and Chern bands in spin-orbit coupled double perovskites},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {feb},
            note = {PIRSA:14020116 see, \url{https://pirsa.org}}
          }

Arun Paramekanti

University of Toronto

Talk number
PIRSA:14020116
Collection
Talk Type
Abstract
We show that double perovskites with 3d and 5d transition metal ions exhibit spin-orbit coupled magnetic excitations, finding good agreement with neutron scattering experiments in bulk powder samples. Motivated by experimental developments in the field of oxide heterostructures, we also study double perovskites films grown along the [111] direction. We show that spin-orbit coupling in such low dimensional systems can drive ferromagnetic order due to electronic correlations. This results in topological Chern bands, with symmetry-allowed trigonal deformations leading to quantum anomalous Hall states supporting a pair of chiral edge modes.