Temperature-induced change from p to n conduction in metallofullerene nanotube peapods

P. W. Chiu, G. Gu, Gyu-Tae Kim, G. Philipp, S. Roth, S. F. Yang, S. Yang

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Abstract

Metallofullerene nanotube peapods were prepared by introducing Dy@C82 into the interior space of single-walled carbon nanotubes. Transport measurements show that the Dy@C82 molecules function as electron donors and transfer charge to the carbon nanotube host. The amount of charge transferred varies with the temperature. At room temperature, the doped nanotube shows p-type behavior as seen from the response to a back gate. As the temperature decreases, the conductance becomes n type and at T<215 K metallic behavior is observed, indicating the degenerate state by doping. Below about 75 K, single-electron charging phenomena dominate the transport and show irregular Coulomb blockade oscillation, implying that the insertion of Dy@C82 splits the tube into a series of several quantum dots.

Original languageEnglish
Pages (from-to)3845-3847
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number23
DOIs
Publication statusPublished - 2001 Dec 3
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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