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

Chéryl Feuillet-Palma (1) , Thomas Delattre (1) , Pascal Morfin (1) , Jean-Marc Berroir (1) , Gwendal Fève (1) , Christian D.C. Glattli (1, 2) , Bernard Plaçais (1) , Audrey Cottet (1) , Takis Kontos (1)

1 LPA - Laboratoire Pierre Aigrain
2 SPEC - UMR3680 - Service de physique de l'état condensé

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.

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Chéryl Feuillet-Palma, Thomas Delattre, Pascal Morfin, Jean-Marc Berroir, Gwendal Fève, et al.. Conserved spin and orbital phase along carbon nanotubes connected with multiple ferromagnetic contacts. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 81, pp.115414. ⟨10.1103/PhysRevB.81.115414⟩. ⟨hal-00484985⟩