Abstract
The influence of surface treatments on the transport properties of epitaxial films of the three-dimensional Dirac semimetal is investigated. We show that exposure of the surface to a low-energy nitrogen plasma improves carrier mobilities, their temperature dependence, and allows for the observation of the quantum Hall effect in scaled thin films. The results provide insights into surface band bending as a function of the surface chemistry and the relative contributions of surface and bulk states to the measured transport properties.
- Received 24 September 2018
DOI:https://doi.org/10.1103/PhysRevMaterials.2.124202
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