Conserved spin and orbital phase along carbon nanotubes connected with multiple ferromagnetic contacts

TL;DR

This study demonstrates that both spin and orbital phases can be preserved in carbon nanotubes with multiple ferromagnetic contacts, enabling advanced spintronics applications exploiting quantum degrees of freedom.

Contribution

It provides experimental evidence of conserved spin and orbital phases in multi-terminal carbon nanotube devices with ferromagnetic contacts, highlighting potential for quantum spintronics.

Findings

Gate-controlled spin signals observed in non-local voltages

Anomalous conductance spin signals detected

Both spin and orbital phases are conserved along nanotubes

Abstract

We report on spin dependent transport measurements in carbon nanotubes based multi-terminal circuits. We observe a gate-controlled spin signal in non-local voltages and an anomalous conductance spin signal, which reveal that both the spin and the orbital phase can be conserved along carbon nanotubes with multiple ferromagnetic contacts. This paves the way for spintronics devices exploiting both these quantum mechanical degrees of freedom on the same footing.