Scattering in Monolayer Molybdenum Disulfide Quantum Dot

TL;DR

This paper analyzes electron scattering in a monolayer MoS_2 quantum dot, deriving analytical solutions and identifying scattering regimes and resonances influenced by energy, potential, and size.

Contribution

It provides the first analytical expressions for eigenstates and scattering properties in MoS_2 quantum dots under an electric potential.

Findings

Identification of two scattering regimes based on parameters

Discovery of scattering resonances at low incident electron energy

Observation of preferred scattering directions in the far-field

Abstract

We investigate the propagation of electrons in a circular quantum dot of monolayer Molybdenium disulfide MoS_2, subjected to an electric potential. Using the continuum model, we present analytical expressions for the eigenstates, scattering coefficients, scattering efficiency, and radial component of the reflected current and electron density. We identify two scattering regimes as a function of physical parameters such as incident electronic energy, potential barrier, and quantum dot radius. For the incident electron low energy, we show that there is an appearance of scattering resonances. Also, we note that the Far-field scattered current has distinct preferred scattering directions.