Electronic Transport Spectroscopy of Carbon Nanotubes in a Magnetic Field

C. Dekker; H. S. J. van der Zant; J. Kong; L. P. Kouwenhoven; P. Jarillo-Herrero; S. De Franceschi

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Electronic Transport Spectroscopy of Carbon Nanotubes in a Magnetic Field

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arxiv cond-mat/0411440 v1 pith:5HYEXKNC submitted 2004-11-17 cond-mat.mes-hall cond-mat.mtrl-sci

P. Jarillo-Herrero , J. Kong , H. S. J. van der Zant , C. Dekker , L. P. Kouwenhoven , S. De Franceschi This is my paper

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keywords magneticfieldmomentorbitalspectroscopycarbonoppositequantum

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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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