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APS » Journals » Phys. Rev. Lett. » Volume 94 » Issue 13
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Phys. Rev. Lett. 94, 136802 (2005) [4 pages]

Spatially Dependent Inelastic Tunneling in a Single Metallofullerene

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M. Grobis1, K. H. Khoo1, R. Yamachika1, Xinghua Lu1, K. Nagaoka1,*, Steven G. Louie1, M. F. Crommie1, H. Kato2, and H. Shinohara2
1Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA and Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720-7300, USA
2Department of Chemistry & Institute for Advanced Research, Nagoya University, Nagoya 464-8602, Japan

Received 21 December 2004; published 6 April 2005

We have measured the elastic and inelastic tunneling properties of isolated Gd@C82 molecules on Ag(001) using cryogenic scanning tunneling spectroscopy. We find that the dominant inelastic channel is spatially well localized to a particular region of the molecule. Ab initio pseudopotential density-functional theory calculations indicate that this channel arises from a vibrational cage mode. We further show that the observed inelastic tunneling localization is explained by strong localization in the molecular electron-phonon coupling to this mode.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.136802
DOI:
10.1103/PhysRevLett.94.136802
PACS:
73.63.-b, 63.22.+m, 68.37.Ef

*Present address: Nanomaterial Laboratory, National Institute for Materials Science, Tsukuba 305-0044, Japan.

 
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