Tunneling Spectra of Individual Magnetic Endofullerene Molecules

Details Tunneling Spectra of Individual Magnetic Endofullerene Molecules Tunneling Spectra of Individual Magnetic Endofullerene Molecules

2008-05-16

arxiv.org/abs/0805.2585v2

Nature Materials 7, 884 - 889 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures. Typeset in LaTeX, updated text of previous version

Scientific paper

10.1038/nmat2300

The manipulation of single magnetic molecules may enable new strategies for high-density information storage and quantum-state control. However, progress in these areas depends on developing techniques for addressing individual molecules and controlling their spin. Here we report success in making electrical contact to individual magnetic N@C60 molecules and measuring spin excitations in their electron tunneling spectra. We verify that the molecules remain magnetic by observing a transition as a function of magnetic field which changes the spin quantum number and also the existence of nonequilibrium tunneling originating from low-energy excited states. From the tunneling spectra, we identify the charge and spin states of the molecule. The measured spectra can be reproduced theoretically by accounting for the exchange interaction between the nitrogen spin and electron(s) on the C60 cage.

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