We study the charged impurity limited mobility in black phosphorus, a highly anisotropic layered material. We compute the mobility within the Boltzmann transport equation under detailed balance condition, and taking into account the anisotropy in transport and electronic structure. For carrier densities accessible in experiments, we obtained an anisotropy ratio of 3 ~ 4 at zero temperature, two-folds larger than that observed in experiments on multilayers samples. We discuss also how the anisotropy depends on carrier density and impurity distribution.
@article{arxiv.1511.09151,
title = {Mobility anisotropy in monolayer black phosphorus due to charged impurities},
author = {Yue Liu and Tony Low and P. Paul Ruden},
journal= {arXiv preprint arXiv:1511.09151},
year = {2016}
}