论文标题
拓扑绝缘体三明治结构中的异常浮子手性拓扑超导性
Anomalous Floquet Chiral Topological Superconductivity in a Topological Insulator Sandwich Structure
论文作者
论文摘要
我们表明，在由磁性拓扑绝缘子 - 螺旋体三明治结构制成的约瑟夫森连接处，浮雕性手性拓扑超导性自然产生。与跨界的施加偏置电压相关的Josephson相位调节将系统驱动到固定频谱中的手性Majorana Edge模式的异常浮雕手性拓扑超导体中，带有零Chern数量的大体浮雕带。偏置电压充当一个调谐参数，使新型动力学拓扑量子相转变可以将系统驱动到无数的外来主要载体浮雕拓扑拓扑超导阶段。我们的理论建立了一种新的范式，用于实现固态系统中的浮雕手性拓扑超导性，应在实验上直接访问。
We show that Floquet chiral topological superconductivity arises naturally in Josephson junctions made of magnetic topological insulator-superconductor sandwich structures. The Josephson phase modulation associated with an applied bias voltage across the junction drives the system into the anomalous Floquet chiral topological superconductor hosting chiral Majorana edge modes in the quasienergy spectrum, with the bulk Floquet bands carrying zero Chern numbers. The bias voltage acts as a tuning parameter enabling novel dynamical topological quantum phase transitions driving the system into a myriad of exotic Majorana-carrying Floquet topological superconducting phases. Our theory establishes a new paradigm for realizing Floquet chiral topological superconductivity in solid-state systems, which should be experimentally directly accessible.
