Mobility anisotropy in monolayer black phosphorus due to charged impurities

Abstract

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.

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• Impact of Orientation Misalignments on Black Phosphorus Ultrascaled Field-effect Transistors
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• Dynamical polarization and the optical response of silicene and related materials
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