The Weyl orbit refers to a new type of cyclotron orbit recently proposed in Weyl semimetals. This is a surface–bulk hybrid orbit that can be modulated by thickness and external fields. Recently, the Weyl orbit has been used to realize the 3D quantum Hall effect, and subsequent rapid progress in experiments promise a new understanding of higher-dimension quantum Hall physics. In this Perspective, we review the theoretical background and the current experimental status of the Weyl orbit, present the extension of Weyl orbit physics in realizing the 3D quantum Hall effect and further discuss the opportunities in tuning topological quantum states and realizing device applications provided by the concept of the Weyl orbit.

外尔轨道是指外尔半金属中最近提出的一种新型回旋轨道。这是一个表面-体混合轨道，可以通过厚度和外部场进行调制。最近，外尔轨道已被用于实现 3D 量子霍尔效应，随后实验的快速进展有望对高维量子霍尔物理产生新的理解。在这个视角中，我们回顾了外尔轨道的理论背景和当前的实验状态，展示了外尔轨道物理学在实现 3D 量子霍尔效应方面的扩展，并进一步讨论了调整拓扑量子态和实现设备应用的机会。外尔轨道的概念。