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Quantum Spin Hall Effect in a Transition Metal Oxide Na 2 IrO 3

2009; American Physical Society; Volume: 102; Issue: 25 Linguagem: Inglês

10.1103/physrevlett.102.256403

1092-0145

Atsuo Shitade, Hosho Katsura, J. Kuneš, Xiao-Liang Qi, Shoucheng Zhang, Naoto Nagaosa,

Physics of Superconductivity and Magnetism

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.