Random telegraph noise in carbon nanotubes and peapods |
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| Authors: | SH Jhang SW Lee DS Lee HY Yu U Dettlaff EEB Campbell S Roth YW Park |
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| Institution: | aSchool of Physics, Seoul National University, Seoul 151-747, Republic of Korea;bBasic Research Laboratory, Electronics and Telecommunications Research Institute, DaeJon 305-350, Republic of Korea;cMax-Planck Institute for Solid State Research, D-70569 Stuttgart, Germany;dDepartment of Experimental Physics, Gothenburg University and Chalmers University of Technology, SE-412 96 Gothenburg, Sweden |
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| Abstract: | The switching of resistance between two discrete values, known as random telegraph noise (RTN), was observed in individual single-walled carbon nanotubes (SWNTs) and C60-filled SWNTs (the so-called peapods). The RTN has been studied as a function of bias-voltage and gate-voltage as well as temperature. By analyzing the features of the RTN, we identify three different types of RTN existing in the SWNT related systems. While the RTN can be generated by the various charge traps in the vicinity of the SWNTs, the RTN for metallic SWNTs is mainly due to reversible defect motions between two metastable states, activated by inelastic scattering with ballistic electrons. On the other hand, the noise for peapods can be attributed to the motion of C60 molecules in hollow space of SWNTs. |
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| Keywords: | Random telegraph noise Single-walled carbon nanotubes |
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