二维陈绝缘体中宇称反常的等离激元探测
Plasmonic detection of the parity anomaly in a two-dimensional Chern insulator
AI总结：
本文通过分析二维宇称反常陈绝缘体中的表面等离激元色散关系，揭示了体拓扑与色散的联系，并发现拓扑非平凡情况显著改变色散曲线，为探测宇称反常提供了等离激元途径。
摘要：
在这项工作中，我们对二维宇称反常陈绝缘体中的表面等离激元极化激元进行了分析研究。我们揭示了BHZ模型所隐含的体拓扑与表面等离激元色散关系之间的联系。在计算色散关系时考虑了各向异性，这允许垂直于导电平面的介电常数有所不同。我们发现了两个表面等离激元模式，每个模式包含两支色散关系分支。与平凡情况相比，拓扑非平凡情况给出了截然不同的霍尔电导率，这导致色散曲线发生显著修改，甚至导致表面等离激元的特定分支缺失。我们的研究为通过等离激元响应探测二维陈绝缘体中的宇称反常提供了一条可能的途径。
英文摘要：
In this work, we present an analytical study on the surface plasmon polaritons in a two dimensional parity anomaly Chern insulator. The connections between the topology in the bulk implied by the BHZ model and the dispersion relations of the surface plasmons have been revealed. Anisotropy has been considered during the calculations of the dispersion relations which allows different permittivities perpendicular to the conductive plane. Two surface plasmon modes each contains two branches of dispersion relations have been found. The topologically non-trivial case gives quite different Hall conductivities compared with the trivial one, which leads to significant modifications of the dispersion curves or even the absence of particular branch of the surface plasmons. Our investigations pave a possible way for the detection of the parity anomaly in a two-dimensional Chern insulator via plasmonic responses.
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