Quantum Spin Hall Effect in a Transition Metal Oxide Na2IrO3
Quantum Spin Hall Effect in a Transition Metal Oxide Na2IrO3
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DOI：
10.1103/physrevlett.102.256403
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发表时间：
2009-06-26
影响因子：
8.6
通讯作者：
Nagaosa, Naoto
中科院分区：
文献类型：
--
作者：
Shitade, Atsuo;Katsura, Hosho;Nagaosa, Naoto
我们从理论上研究了5d过渡金属氧化物Na2 IrO3的电子态，其中自旋轨道相互作用和电子相关性都起着至关重要的作用。紧束缚模型分析和第一性原理能带结构计算预测该材料是一个分层的量子自旋霍尔系统。由于电子的相关性，反铁磁序首先在边缘发展，然后在低温下在体块内部发展。
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.