Magnetothermoelectric transport properties in phosphorene

TL;DR

This paper investigates the electrical and thermoelectric transport properties of phosphorene under magnetic fields and disorder, revealing anisotropic thermoelectric responses and effects of bias voltage on thermopower and Nernst signals.

Contribution

It provides a numerical analysis of magnetothermoelectric transport in phosphorene, highlighting spectral asymmetry effects and anisotropic thermoelectric behavior.

Findings

Hall conductivity similar to 2D electron gas with shifted plateaus

Remarkable anisotropy in thermoelectric conductivity and Nernst signal

Enhanced thermopower and Nernst signals under bias voltage

Abstract

We numerically study the electrical and thermoelectric transport properties in phosphorene in the presence of both a magnetic field and disorder. The quantized Hall conductivity is similar to that of a conventional two-dimensional electron gas, but the positions of all the Hall plateaus shift to the left due to the spectral asymmetry, in agreement with the experimental observations. The thermoelectric conductivity and Nernst signal exhibit remarkable anisotropy, and the thermopower is nearly isotropic. When a bias voltage is applied between top and bottom layers of phosphorene, both thermopower and Nernst signal are enhanced and their peak values become large.