Electrical evidence for the encapsulation of C-60 inside a carbon nanotube: Random telegraph signal and hysteric current-voltage characteristics
- Authors
- Siegmar Roth; U. Dettlaf-Weglikows
- Issue Date
- 10월-2008
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.78, no.15, pp.155415
- Indexed
- SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 78
- Number
- 15
- Start Page
- 155415
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/104613
- ISSN
- 10980121
- Abstract
- We present electrical evidence for the encapsulation of C-60's inside a carbon nanotube, random telegraph signals (RTSs), and hysteric current-voltage characteristics. RTSs are shown only at voltages higher than a critical voltage. We suggest that the origin of the RTSs is ascribed to the instability of the quantum harmonic oscillations of C-60's. RTSs are smeared out at a temperature which is well correlated with the energy level of the vibrational quantum mediated by the van der Waals binding between the carbon nanotube and C-60's. In addition, hysteric behavior in cyclic current-voltage characteristics is explained by the longitudinal motion and resettlement of the C-60's with the modulation of the size of the quantum dot mediated by the C-60 insertion.
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