"Quantum Spin Hall Effect in a Transition Metal Oxide Na2IrO3"

Atsuo Shitade: Hosho Katsura, Jan KuneŇ°, Xiao-Liang Qi, Shou-Cheng Zhang, and Naoto Nagaosa; Phys. Rev. Lett., 06/24/09.

Additional Authors: Hosho Katsura, Jan KuneŇ°, Xiao-Liang Qi, Shou-Cheng Zhang, and Naoto Nagaosa

Abstract:

We study theoretically the electronic states in a 5d transition metal oxide Na2IrO3, in which both the spin-orbit interaction and the electron correlation play crucial roles. A tight-binding model analysis together with the first-principles band structure calculation predicts that this material is a layered quantum spin Hall system. Because of the electron correlation, an antiferromagnetic order first develops at the edge, and later inside the bulk at low temperatures.