论文标题
通过打破$ \ Mathcal {pt} $对称和定期驾驶，工程二级节点线半按照
Engineering second-order nodal-line semimetals by breaking $\mathcal{PT}$ symmetry and periodic driving
论文作者
论文摘要
拓扑结节线半学表现出了新的运输现象，托管独特的鼓头表面状态，被淋巴结线封闭。因此，对具有不同淋巴结结构的拓扑半学的探索引起了很多关注。在本文中，我们首先在$ \ Mathcal {pt} $ - 对称性损坏的系统中找到了与铰链Fermi Arcs和Drumhead Surface状态共存的二阶节点线半度（SONLS）。然后，在不更改固有参数的情况下，我们人为地创建了由不同的胶质差距和丰富的节点线结构托管的外来混合阶结节线半光，包括节点链，交叉环节网，交叉线节点和节点网络通过定期驱动我们的Sonls驱动器。富含拓扑半学的分类，Sonls的订单和节点线结构的这种Floquet工程高可调性为探索其进一步应用奠定了基础。
Hosting unique drumhead surface states enclosed by nodal lines, topological nodal-line semimetals exhibit novel transport phenomena. Thus, the exploration of topological semimetals with different nodal-line structures has attracted much attention. In this paper, we first find a second-order nodal line semimetal (SONLS), which has coexisting hinge Fermi arcs and drumhead surface states, in a $\mathcal{PT}$-symmetry broken system. Then, without changing the intrinsic parameters, we artificially create exotic hybrid-order nodal-line semimetals hosted by different quasienergy gaps and rich nodal-line structures including nodal chains, crossing ring nodal nets, crossing line nodes, and nodal nets by applying a periodic driving on our SONLS. Enriching the classification of topological semimetals, such Floquet engineered high tunability of the orders and nodal-line structures of the SONLS sets up a foundation for exploring its further applications.
