Light: Science & Applications ( IF 19.4 ) Pub Date : 2020-08-19 , DOI: 10.1038/s41377-020-00351-2 Matthieu Bellec 1 , Charles Poli 2 , Ulrich Kuhl 1 , Fabrice Mortessagne 1 , Henning Schomerus 2
Using an array of coupled microwave resonators arranged in a deformed honeycomb lattice, we experimentally observe the formation of pseudo-Landau levels in the whole crossover from vanishing to large pseudomagnetic field strengths. This result is achieved by utilising an adaptable setup in a geometry that is compatible with the pseudo-Landau levels at all field strengths. The adopted approach enables us to observe the fully formed flat-band pseudo-Landau levels spectrally as sharp peaks in the photonic density of states and image the associated wavefunctions spatially, where we provide clear evidence for a characteristic nodal structure reflecting the previously elusive supersymmetry in the underlying low-energy theory. In particular, we resolve the full sublattice polarisation of the anomalous 0th pseudo-Landau level, which reveals a deep connection to zigzag edge states in the unstrained case.
中文翻译:
应变微波石墨烯中超对称伪朗道能级的观察。
使用排列在变形蜂窝晶格中的耦合微波谐振器阵列,我们通过实验观察了从消失到大伪磁场强度的整个交叉中伪朗道能级的形成。该结果是通过在与所有场强下的伪朗道能级兼容的几何结构中使用适应性设置来实现的。所采用的方法使我们能够在光谱上观察完全形成的平带伪朗道能级作为状态光子密度中的尖峰,并在空间上对相关波函数进行成像,我们为反映先前难以捉摸的超对称性的特征节点结构提供了清晰的证据。基本的低能理论。特别是,我们解决了异常第 0 伪朗道能级的完整亚晶格极化,