Degeneracy doubling and sublattice polarization in strain-induced pseudo-Landau levels
Degeneracy doubling and sublattice polarization in strain-induced pseudo-Landau levels
复制标题
应变诱导赝朗道能级中的简并倍增和亚晶格极化
DOI：
10.1103/physrevb.90.155418
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发表时间：
2014
影响因子：
3.7
通讯作者：
Poli C
中科院分区：
文献类型：
--
作者：
Poli C
应变蜂窝晶格中的伪朗道能级（pLL）的简并性和空间支持系统地依赖于几何形状;例如，在六边形和矩形薄片中，第零pLL显示出两倍的简并性增加，而第零pLL的特征子晶格极化仅在以三角形为终端的三角形中完全实现。这些特征是由原子论中的代数约束所决定的，并且意味着偏离了标准图像，在标准图像中，由磁场引起的pLL和朗道能级之间的所有定性差异都可以追溯到伪磁场的谷反对称。
The degeneracy and spatial support of pseudo-Landau levels (pLLs) in strained honeycomb lattices systematically depends on the geometry; for instance, in hexagonal and rectangular flakes the zeroth pLL displays a twofold increased degeneracy, while the characteristic sublattice polarization of the zeroth pLL is only fully realized in a zigzag-terminated triangle. These features are dictated by algebraic constraints in the atomistic theory and signify a departure from the standard picture in which all qualitative differences between pLLs and Landau levels induced by a magnetic field trace back to the valley antisymmetry of the pseudomagnetic field.