Abstract
Nonlocality is an interesting topic in quantum physics and is usually mediated by some unique quantum states. Here we investigate a Weyl semimetal slab and find an exotic nonlocal correlation effect when placing two potential wells merely on the top and bottom surfaces. This correlation arises from the peculiar Weyl orbit in Weyl semimetals and is a consequence of the bulk-boundary correspondence in topological band theory. A giant nonlocal transport signal and a body breakdown by Weyl fermions are further uncovered, which can serve as signatures for verifying this nonlocal correlation effect experimentally. Our results extend a new member in the nonlocality family and have potential applications for designing new electric devices with fancy functions.
Highlights
Nonlocality has always been an intriguing topic in quantum physics
II, we introduce the model of our setup and explain the mechanism of the nonlocal correlation mediated by the Weyl orbits
The surface potential wells (PWs) can be generated by an impurity [36] or STM tip potential [37,38]
Summary
Nonlocality has always been an intriguing topic in quantum physics. The most famous example is the quantum entanglement [1,2] of two or more particles concerning their spin, momentum, or position in the entangled state. The Weyl node plays the role of magnetic monopoles with positive or negative chirality in the momentum space, and due to the bulk-boundary correspondence, the chiral surface states are formed in the WSM slab sketched in Fig. 1(a) and propagate in ±x direction in the bottom (top) surface, as shown with the yellow and green arrows. This results in a nonlocal correlation which is formed between the top and bottom PWs and mediated by the bulk states inside the Weyl orbit
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