Details

Autor(en) / Beteiligte

• Oreg, Y
• Byczuk, K
• Halperin, BI

Titel

Spin configurations of a carbon nanotube in a nonuniform external potential

Ist Teil von

• Physical review letters, 2000-07, Vol.85 (2), p.365-368

Ort / Verlag

United States

Erscheinungsjahr

2000

Quelle

American Physical Society

Beschreibungen/Notizen

• We study, theoretically, the ground state spin of a carbon nanotube in the presence of an external potential. We find that when the external potential is applied to a part of the nanotube, its variation changes the single electron spectrum significantly. This, in combination with Coulomb repulsion and the symmetry properties of a finite length armchair nanotube, induces spin flips in the ground state when the external potential is varied. We discuss the possible application of our theory to recent measurements of Coulomb-blocked peaks and their dependence on a weak magnetic field in armchair carbon nanotubes.