Theory of Conductivity in Semiconducting Single-Wall Carbon Nanotubes

Autor:	Akira Suzuki, Salvador Godoy, Shigeji Fujita
Rok vydání:	2012
Předmět:	Materials science Condensed matter physics Graphene Phonon chemistry.chemical_element Electron Carbon nanotube Conductivity Thermal conduction law.invention chemistry law Cooper pair Carbon
Zdroj:	Journal of Modern Physics. :1550-1555
ISSN:	2153-120X 2153-1196
Popis:	The conduction of a single-wall carbon nanotube depends on the pitch. If there are an integral number of carbon hexagons per pitch, then the system is periodic along the tube axis and allows “holes” (not “electrons”) to move inside the tube. This case accounts for a semiconducting behavior with the activation energy of the order of around 3 meV. There is a distribution of the activation energy since the pitch and the circumference can vary. Otherwise nanotubes show metallic behaviors (significantly higher conductivity). “Electrons” and “holes” can move in the graphene wall (two dimensions). The conduction in the wall is the same as in graphene if the finiteness of the circumference is disregarded. Cooper pairs formed by the phonon exchange attraction moving in the wall is shown to generate a temperature-independent conduction at low temperature (3 - 20 K).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::55e5d66ac8517a21f2a136a808c391c4 https://doi.org/10.4236/jmp.2012.310191 Zobrazit plný text záznamu