Quantum Anomalous Hall Effect in a Perovskite and Inverse-Perovskite Sandwich Structure
Mesoscale and Nanoscale Physics
2015-12-18 v1
Abstract
Based on first-principles calculations, we propose a sandwich structure composed of a G-type anti-ferromagnetic (AFM) Mott insulator LaCrO grown along the [001] direction with one atomic layer replaced by an inverse-perovskite material SrPbO. We show that the system is in a topologically nontrivial phase characterized by simultaneous nonzero charge and spin Chern numbers, which can support a spin-polarized and dissipationless edge current in a finite system. Since these two materials are stable in bulk and match each other with only small lattice distortions, the composite material is expected easy to synthesize.
Keywords
Cite
@article{arxiv.1512.05494,
title = {Quantum Anomalous Hall Effect in a Perovskite and Inverse-Perovskite Sandwich Structure},
author = {Long-Hua Wu and Qi-Feng Liang and Xiao Hu},
journal= {arXiv preprint arXiv:1512.05494},
year = {2015}
}
Comments
4 pages, 4 figures