Novel Topological Phase with a Zero Berry Curvature
Novel Topological Phase with a Zero Berry Curvature
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DOI：
10.1103/physrevlett.118.076803
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发表时间：
2017-02-17
影响因子：
8.6
通讯作者：
Wakabayashi, Katsunori
中科院分区：
文献类型：
--
作者：
Liu, Feng;Wakabayashi, Katsunori
提出了一个二维（2D）晶格模型，表现出一个非平凡的拓扑相的贝里曲率的情况下。相反，Berry连接提供了模型中的拓扑非平凡相，其在动量空间上的积分，即所谓的2D Zak相，在每个方向上产生分数波偏振。这些分数波偏振在模型中表现为具有相反宇称的简并边缘态。
present a two-dimensional (2D) lattice model that exhibits a nontrivial topological phase in the absence of the Berry curvature. Instead, the Berry connection provides the topological nontrivial phase in the model, whose integration over the momentum space, the so-called 2D Zak phase, yields a fractional wave polarization in each direction. These fractional wave polarizations manifest themselves as degenerated edge states with opposite parities in the model.