Enhancement of the Bulk Photovoltaic Effect in Topological Insulators.
Enhancement of the Bulk Photovoltaic Effect in Topological Insulators.
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DOI：
10.1103/physrevlett.116.237402
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发表时间：
2015-08
影响因子：
8.6
通讯作者：
L. Tan;A. Rappe
中科院分区：
文献类型：
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作者：
L. Tan;A. Rappe
我们研究了接近带反转拓扑相变的材料的移位电流体光伏响应。我们发现，体光电流反转的带反转过渡的方向，其幅度增强的相变附近。用第一性原理密度泛函理论计算了BiTeI和CsPbI_{3}在静水压力下的动力学行为，并用解析模型解释了这些结果，表明这种现象在不同的材料体系中仍然存在.
We investigate the shift current bulk photovoltaic response of materials close to a band inversion topological phase transition. We find that the bulk photocurrent reverses direction across the band inversion transition, and that its magnitude is enhanced in the vicinity of the phase transition. These results are demonstrated with first principles density functional theory calculations of BiTeI and CsPbI_{3} under hydrostatic pressure, and explained with an analytical model, suggesting that this phenomenon remains robust across disparate material systems.