Pure spin current and negative differential electric resistance in hybrid systems

TL;DR

This study investigates spin-dependent transport in hybrid nanoribbons, revealing thermal spin currents dominate charge transport, with spin up and down currents flowing oppositely under various external influences.

Contribution

It introduces a detailed analysis of thermal spin currents and negative differential resistance in hybrid systems using non-equilibrium Green's function methods.

Findings

Spin up and down currents flow oppositely with similar magnitudes.

Thermal spin current dominates charge transport.

Thermal electron current is nearly absent.

Abstract

This paper aims to investigate the spin dependent transport properties in hybrid nanoribbons, using the non equilibrium Greens function method. The effects of temperature gradient between the left and right leads, the ferromagnetic exchange field, and the local external electric fields are also included. The results show that the spin up and spin down currents are produced and flow in opposite directions with almost equal magnitudes. This evidently shows that the carrier transport is dominated by the thermal spin current. Whereas the thermal electron current is almost disappeared.