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arXiv · 2309.15457

Engineering the in-plane anomalous Hall effect in Cd$_3$As$_2$ thin films

Wangqian Miao·Binghao Guo·Susanne Stemmer·Xi Dai
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Abstract

We predict two topological phase transitions for cadmium arsenide (\ce{Cd3As2}) thin films under in-plane magnetic field, taking advantage of a four-band $k\cdot p$ model and effective $g$ factors calculated from first principles. Film thickness, growth direction and in-plane Zeeman coupling strength can all serve as control parameters to drive these phase transitions. For (001) oriented \ce{Cd3As2} thin films, a two dimensional Weyl semimetal phase protected by $C_{2z}\mathcal{T}$ symmetry can be realized using an in-plane magnetic field, which has recently been reported in our companion paper. We then put forth two pathways to achieve in-plane anomalous Hall effects (IPAHE). By either introducing a trigonal warping term or altering the growth orientation, the emergent $C_{2z} \mathcal{T}$ symmetry can be broken. Consequently, in the clean limit and at low temperatures, quantized Hall plateaus induced by in-plane Zeeman fields become observable.

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Wangqian Miao, Binghao Guo, Susanne Stemmer, Xi Dai. 2023-09-27. Engineering the in-plane anomalous Hall effect in Cd$_3$As$_2$ thin films. https://doi.org/10.1103/physrevb.109.155408

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