论文标题
在过渡金属二阶拓扑绝缘子TA $ _2 $ pd $ _3 $ _3 $ TE $ _5 $的相关边缘的强大而可调的Luttinger液体
A robust and tunable Luttinger liquid in correlated edge of transition-metal second-order topological insulator Ta$_2$Pd$_3$Te$_5$
论文作者
论文摘要
拓扑与相互作用之间的相互作用始终在凝结物理物理学中起重要作用，并诱导许多外来的量子阶段，而稀有的过渡金属分层材料（TMLM）已被证明具有两者。在这里，我们报告了一个带有相关边缘状态的二维二阶拓扑（也是四维拓扑拓扑） - tmlm ta $ _2 $ _2 $ _3 $ _3 $ _5 $ _5 $具有二维二阶拓扑（也是四核拓扑拓扑器） - luttinger液体。它归因于由非凡的双波段倒置引起的电荷和原子中心之间的不匹配的非常规性。这种一维受保护的边缘状态可保留Luttinger液体行为，其稳健性和从微小到宏观尺寸的尺寸稳定性和普遍性，从而导致明显的各向异性电气传输通过大量材料的二维侧。此外，可以通过厚度调节整体间隙，从而为Luttinger液体提供了广泛的范围相图。这些提供了一个有吸引力的模型来研究相关拓扑系统中的相互作用和量子阶段。
The interplay between topology and interaction always plays an important role in condensed matter physics and induces many exotic quantum phases, while rare transition metal layered material (TMLM) has been proved to possess both. Here we report a TMLM Ta$_2$Pd$_3$Te$_5$ has the two-dimensional second-order topology (also a quadrupole topological insulator) with correlated edge states - Luttinger liquid. It is ascribed to the unconventional nature of the mismatch between charge- and atomic- centers induced by a remarkable double-band inversion. This one-dimensional protected edge state preserves the Luttinger liquid behavior with robustness and universality in scale from micro- to macro- size, leading to a significant anisotropic electrical transport through two-dimensional sides of bulk materials. Moreover, the bulk gap can be modulated by the thickness, resulting in an extensive-range phase diagram for Luttinger liquid. These provide an attractive model to study the interaction and quantum phases in correlated topological systems.
