Magnetic ratchet effect in phosphorene

TL;DR

This paper investigates the magnetic ratchet effect in phosphorene using a semi-classical Boltzmann approach, revealing how anisotropic 2D materials respond to various light polarizations under magnetic fields.

Contribution

It derives the Hamiltonian of phosphorene in a magnetic field and analyzes the nonlinear ratchet current response to different light polarizations.

Findings

Ratchet current responds to linear, circular, and unpolarized light.

Magnetic field influences nonlinear dynamics in phosphorene.

Anisotropic response characteristic of 2D materials.

Abstract

The magnetic ratchet effect has been studied in phosphorene by the use of the Boltzmann kinetic equation that is a semi-classical approach. The Hamiltonian of phosphorene in a steady parallel magnetic field is derived using the tight-binding model. We consider the effect of the magnetic field on non--linear dynamics in the presence of an ac laser field and spatial inversion asymmetry. We have shown that for anisotropic 2D materials and phosphorene, the ratchet current has the response to three different light polarizations: linearly polarized light, circularly polarized light, and unpolarized light.