In-plane anomalous features in the 3D quantum Hall regime

• URL: http://arxiv.org/abs/2512.04353v1
• Date: Thu, 04 Dec 2025 00:58:20 GMT
• Title: In-plane anomalous features in the 3D quantum Hall regime
• Authors: Ming Lu, Xiao-Xiao Zhang,
• Abstract summary: Studies of the 3D quantum Hall effect (QHE) have primarily emphasized transport features that mimic the well-established 2D QHE.<n>In this work, we show that qualitatively new features arise when an in-plane magnetic field is applied to a 3D Weyl semimetal in the quantum Hall regime.
• Score: 25.626420736070305
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Studies of the 3D quantum Hall effect (QHE) have primarily emphasized transport features that mimic the well-established 2D QHE. In this work, we show that qualitatively new features arise when an in-plane magnetic field is applied to a 3D Weyl semimetal in the quantum Hall regime. An unexpected Hall quantum oscillation, distinct from the Weyl-orbit oscillation, coexists with the QHE, along with an unquantized two-terminal magnetoresistance. Moreover, unconventional antichiral transmission enables a peculiar disorder-robust negative longitudinal resistance. Quantization tunable by the lead configuration is further found in this transport geometry. A unique type of nonlocal quantum backscattering channels underlies these phenomena. Our work demonstrates a breakdown of the topological characterization of transport even with 3D Chern numbers and reveals hidden 3D QHE transport properties. It opens a new class of transport measurements and phenomena.

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