We investigate quantum transport in graphene/InSe heterostructures and find major asymmetries in the longitudinal resistance (Rxx) and vanishing Rxx peaks at high magnetic fields, particularly at the charge-neutrality point. Our Landauer-Buttiker analysis and numerical simulations show that a monotonically varying density gradient combined with a full equilibration mechanism can explain these phenomena. Our results also suggest the presence of trivial long-range chiral edge current and offer a broadly applicable way to engineer transport properties in quantum Hall systems.
@article{arxiv.2511.22400,
title = {Asymmetric quantum Hall effect and diminished $\nu=0$ longitudinal resistance in graphene/InSe heterostructures},
author = {Wenxue He and Shijin Li and Jinhao Cheng and Yingpeng Zhang and Kaixuan Fan and Jiabo Liu and Shuaishuai Ding and Wenping Hu and Fan Yang and Chen Wang and Qing-Feng Sun and Hechen Ren},
journal= {arXiv preprint arXiv:2511.22400},
year = {2025}
}