光子联苯烯网络中拓扑扶手椅型边缘态的观测
Observation of Topological Armchair Edge States in Photonic Biphenylene Network
AI总结：
该研究利用光子联苯烯网络（BPN）晶格，在不破坏时间反演对称性的条件下实验观测到扶手椅型拓扑边缘态，并揭示了边缘态与体态的异常杂化，为扩展二维材料应用提供了新途径。
摘要：
二维材料中的边缘态对于自旋电子学、量子计算和逻辑晶体管的发展至关重要。对于石墨烯纳米带，众所周知锯齿型边缘可以承载边缘态，但在不破坏时间反演对称性的情况下实现扶手椅型边缘态一直具有挑战性。在此，通过使用最近合成的类石墨烯联苯烯网络（BPN）的光子类比物，我们展示了特别是在扶手椅型边缘处的拓扑带隙内边缘态。有趣的是，若干体态沿扶手椅型边界保留了边缘态的特征，表现出边缘态与体态之间不同寻常的杂化。在实验中，我们在写入非线性晶体的光子BPN晶格中观测到了锯齿型和扶手椅型边缘态。此外，我们阐明了BPN与石墨烯晶格之间扶手椅型边界的不同特征。我们在此展示的结果可能适用于碳基BPN以及光子学之外的其他人工平台，有望扩展二维材料的应用范围。
英文摘要：
Edge states in 2D materials are vital for advancements in spintronics, quantum computing, and logic transistors. For graphene nanoribbons, it is well known that the zigzag edges can host edge states, but realization of armchair edge states has been challenging without breaking the time-reversal symmetry. Here, by using a photonic analog of recently synthesized graphene-like biphenylene network (BPN), we demonstrate topological in-gap edge states particularly at the armchair edges. Interestingly, several bulk states preserve the characteristics of edge states along the armchair boundaries, manifesting an unusual hybridization between the edge and bulk states. Experimentally, we observe both zigzag and armchair edge states in photonic BPN lattices written in a nonlinear crystal. Furthermore, we clarify the different features of the armchair boundary between the BPN and graphene lattices. Our results demonstrated here may be applicable to carbon-based BPNs and other artificial platforms beyond photonics, holding promise for expanding the application scope of 2D materials.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
