Electronic Transport Spectroscopy of Carbon Nanotubes in a Magnetic Field

Details Electronic Transport Spectroscopy of Carbon Nanotubes in a Magnetic Field Electronic Transport Spectroscopy of Carbon Nanotubes in a Magnetic Field

2004-11-17

arxiv.org/abs/cond-mat/0411440v1

Phys. Rev. Lett. 94, 156802 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.94.156802

We report magnetic field spectroscopy measurements in carbon nanotube quantum dots exhibiting four-fold shell structure in the energy level spectrum. The magnetic field induces a large splitting between the two orbital states of each shell, demonstrating their opposite magnetic moment and determining transitions in the spin and orbital configuration of the quantum dot ground state. We use inelastic cotunneling spectroscopy to accurately resolve the spin and orbital contributions to the magnetic moment. A small coupling is found between orbitals with opposite magnetic moment leading to anticrossing behavior at zero field.

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