Tunable spin-polaron state in a singly clamped semiconducting carbon nanotube

F Pistolesi (1) , R Shekhter (2)

1 LOMA - Laboratoire Ondes et Matière d'Aquitaine
2 Department of Physics (Göthenburg)

We consider a semiconducting carbon nanotube (CNT) laying on a ferromagnetic insulating sub-strate with one end depassing the substrate and suspended over a metallic gate. We assume that the polarised substrate induces an exchange interaction acting as a local magnetic field for the electrons in the non-suspended CNT side. Generalizing the approach of I. Snyman and Yu.V. Nazarov [Phys. Rev. Lett. 108, 076805 (2012)] we show that one can generate electrostatically a tun-able spin-polarized polaronic state localized at the bending end of the CNT. We argue that at low temperatures manipulation and detection of the localised quantum spin state is possible.

Mots clés: Nanotubes; Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields; Micro- and nano-electromechanical systems (MEMS/NEMS) and devices

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

F Pistolesi, R Shekhter. Tunable spin-polaron state in a singly clamped semiconducting carbon nanotube. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 92 (3), pp.035423 (1-5). ⟨10.1103/PhysRevB.92.035423⟩. ⟨hal-01154281⟩