Under more consideration, it seems that bulk valley current mediated nonlocal resistance is inconsistent with Landau-Buttiker formalism. We believe Landau-Buttiker formalism is right and the declared bulk valley current mediated nonlocal resistance is questionable and the experimental signal should be attributed to other origins.
Cite
@article{arxiv.1607.03346,
title = {Numerical study of the quantum valley Hall effect},
author = {S. K. Wang and Jun Wang and Jun-Feng Liu},
journal= {arXiv preprint arXiv:1607.03346},
year = {2017}
}
Comments
It seems that bulk valley current mediated nonlocal resistance is nconsistent with Landau-Buttiker formalism