Temperature dependent anisotropic charge carrier mobility limited by ionized impurity scattering in thin-layer black phosphorus

Abstract

Anisotropic charge carrier transport in black phosphorus limited by ionized impurity scattering at finite temperature is explored theoretically. The anisotropic electronic structure enters the calculation for the polarizability (screening), the momentum relaxation time, and the mobility. For finite temperature, scattering is not limited to the Fermi surface and the polarizability is temperature dependent. The impact of screening is investigated in detail with its dependence on carrier density and temperature. Competing with the thermal excitation effects, the temperature dependence of the polarizability is found to dominate for T<100K. As a result, the charge carrier mobility slowly decreases with increasing temperature. The weak temperature dependence of the mobility and its anisotropy ratio of 1.9-3.2 agree with published experimental data.

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• Effect of excess charge carriers and fluid medium on the magnitude and the sign of the Casimir-Lifshitz torque
• Current induced by a tilted magnetic field in phosphorene under terahertz laser radiation
• Electronic properties of the parabolic Dirac system
• Magnetic ratchet effect in phosphorene
• Electronic transport and dynamical polarization in bilayer silicene-like system
• The electrothermal conductance and heat capacity of black phosphorus