Journal
PHYSICAL REVIEW LETTERS
Volume 87, Issue 12, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.87.126801
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The existence of a quantum loop current in a C-60 molecular bridge is predicted using the Green's function method. The model for the molecular bridge consists of a C-60 molecule attached to one-dimensional conductive electrodes. It is shown that the loop current is related to the degeneracy of the energy levels of the C-60 molecule. Specific to this loop current is its magnitude which is much larger than that of the source-drain current. The associated magnetic moment also shows certain remarkable features such as its inversion with the energy across the molecular levels and the restriction of its direction onto a single plane.
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