Theoretical study of electrical transport in a fullerene-doped semiconducting carbon nanotubes

Using a tight-binding model and the Landauer–Büttiker formalism, we have calculated the current–voltage characteristics of a semiconducting single-walled carbon nanotube and that of a fullerene (C60)-doped carbon nanotube (peapod) structure. Our calculation shows that fullerene encapsulation in a se...

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Veröffentlicht in:Journal of applied physics 2004-01, Vol.95 (2), p.694-697
Hauptverfasser: Pati, Ranjit, Senapati, Laxmidhar, Ajayan, Pulickel M., Nayak, Saroj K.
Format: Artikel
Sprache:eng
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Zusammenfassung:Using a tight-binding model and the Landauer–Büttiker formalism, we have calculated the current–voltage characteristics of a semiconducting single-walled carbon nanotube and that of a fullerene (C60)-doped carbon nanotube (peapod) structure. Our calculation shows that fullerene encapsulation in a semiconducting nanotube enhances the electrical conductivity of the nanotube, which is consistent with recent experimental measurements. We explain the increased electronic conduction in the semiconducting nanopeapod structure by analyzing the density of states of both pristine and C60-doped nanotubes. A first-principles density functional calculation shows a significant amount of charge transfer (0.62e−) from the nanotube to C60, suggesting that holes are the primary charge carriers in the peapod.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1634368