Perfect Spin-filtering and Giant Magnetoresistance with Fe-terminated Graphene Nanoribbon

TL;DR

This study demonstrates that Fe-terminated zig-zag graphene nanoribbons can achieve perfect spin-filtering and giant magnetoresistance, controllable via external magnetic fields, promising for spintronic applications.

Contribution

First-principles simulations reveal controllable spin transport and high magnetoresistance in Fe-terminated zGNRs, advancing spintronic device design.

Findings

MR > 1000 at small bias

Perfect spin-filtering achieved with external magnetic field

Spin configuration controllable by magnetic field

Abstract

Spin-dependent electronic transport properties of Fe-terminated zig-zag graphene nanoribbons (zGNR) have been studied using first-principles transport simulations. The spin configuration of proposed zGNR junction can be controlled with external magnetic field, and the tunneling junction show MR>1000 at small bias and is a perfect spin-filter by applying uniform external magnetic filed at small bias.