Tunable spin transport using zigzag MoS2 nanoribbon

TL;DR

This paper investigates how external electric fields influence spin-dependent conductance in zigzag MoS2 nanoribbons, demonstrating tunable spin filtering and inversion capabilities for potential spintronic applications.

Contribution

It introduces a method to control spin transport in MoS2 nanoribbons using combined electric fields, enabling spin filtering and inversion.

Findings

Electric fields induce spin filtering in MoS2 nanoribbons.

The nanoribbon acts as a spin inverter at certain field strengths.

Spin splitting occurs in the valence band without external fields.

Abstract

We consider a zigzag nanoribbon of MoS2 and study its spin-dependent conductance and spin-polarization in presence (absent) of an external electric field. The field is not only perpendicular to the molybdenum plane (called vertical field Ez) but also to the transport direction of electrons (called transverse field Et). It is shown that, while in the absent of the external electric field, two bands of seven bands are spin split in the valence band but no spin splitting is seen at point . Under applying the electric field we show, the ribbon behaves as a prefect spin up (down) filter if and only if the both components of the electrical field are present. Finally it is shown that, by changing the strength of , the ribbon acts as a spin inverter for fixed values of Ez .