Prefect spin filtering and spin inverting using a MoS2 quantum dot

TL;DR

This paper investigates how a MoS2 quantum dot can be used to achieve perfect spin filtering and spin inversion, with the external electric field controlling the spin-dependent conductance.

Contribution

It demonstrates the ability to switch between non-perfect and perfect spin filtering and inversion in a MoS2 quantum dot via an external electric field.

Findings

Deformation causes spin-splitting without electric field.

External electric field enables perfect spin filtering.

Device can act as a spin inverter.

Abstract

The spin-dependent conductance and spin-polarization of a MoS2 quantum dot are studied in presence (absent) of an external electric field perpendicular to the molybdenum plane. It is shown that in absence of the electric field, the deformation of a MoS2 ribbon structure causes spin-splitting in the dot and non-prefect spin filtering is seen. Therefore, the technique could be used for designing spin-dependent devices of MoS2. Also, we show that the device could behave as a prefect spin filter and spin inverter under applying an external electric.