# Tunnel-Field-Effect Spin Filter from Two-Dimensional Antiferromagnetic Stanene

## TL;DR

This paper introduces a room-temperature, voltage-controlled spin filter device based on monolayer stanene, utilizing spin-polarized edge states to achieve high spin polarization in a compact form.

## Contribution

It presents a novel device concept leveraging stanene's edge states for highly polarized spin currents, demonstrated through ab-initio and quantum transport simulations.

## Key findings

- Achieves up to 98% spin polarization at room temperature.
- Operates with a small voltage of 0.3 V.
- Demonstrates tunable spin polarization via electric field.

## Abstract

We propose a device concept, based on monolayer stanene, able to provide highly polarized spin currents (up to a $98\%$) with voltage-controlled spin polarization operating at room temperature and with small operating voltage ($0.3$ V). The concept exploits the presence of spin-polarized edge states in a stanene nanoribbon. The spin polarization of the total current can be modulated by a differential tuning of the transmission properties, and of the occupation of edge states of different spin, via the application of an in-plane electric field. We demonstrate device operation using ab-initio and quantum transport simulations.