论文标题
整数量子厅阶段的分数边缘重建
Fractional Edge Reconstruction in Integer Quantum Hall Phases
论文作者
论文摘要
受保护的边缘模式是物质拓扑状态的基石。最简单的示例是由Landau级别填充统一的整数量子厅状态提供的，该状态应具有带有电子激发的单手性模式。在存在平滑限制电势的情况下，迄今为止认为，只有出现其他反向传播的整数电荷模式，才可以部分修改这张图片。在这里，我们演示了此范式的分解：系统有利于支持分数激发的边缘模式的形成。这说明了先前的观察结果，并导致还可以进行实验测试的其他预测。
Protected edge modes are the cornerstone of topological states of matter. The simplest example is provided by the integer quantum Hall state at Landau level filling unity, which should feature a single chiral mode carrying electronic excitations. In the presence of a smooth confining potential it was hitherto believed that this picture may only be partially modified by the appearance of additional counterpropagating integer-charge modes. Here, we demonstrate the breakdown of this paradigm: The system favors the formation of edge modes supporting fractional excitations. This accounts for previous observations, and leads to additional predictions amenable to experimental tests.
