Possible explanation for the conductance of a single quantum unit in metallic carbon nanotubes

Hyoung Joon Choi, Jisoon Ihm, Young Gui Yoon, Steven G. Louie

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

The quantum conductance of a metallic carbon nanotube with one end immersed in a jellium metal is studied. We find that the incident π*-band electrons, having a very high angular momentum with respect to the tube axis, go through the tube without being scattered by the free electrons in surrounding metal and contribute a quantum unit (2e2/h) to the conductance. On the other hand, the incident π-band electrons, with the pz atomic orbitals in phase along the tube circumference, experience strong resonant back-scattering because the low-angular-momentum states at the Fermi level have a dominantly metallic character in the nanotube-jellium metal coexistence region. These results provide a possible explanation for the experimentally observed conductance of one quantum unit instead of two for nanotubes with one end dipped into liquid metal such as mercury.

Original languageEnglish
Pages (from-to)R14009-R14011
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number20
DOIs
Publication statusPublished - 1999 Jan 1

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Carbon Nanotubes
Carbon nanotubes
Angular momentum
Metals
carbon nanotubes
tubes
Nanotubes
Electrons
nanotubes
angular momentum
metals
Mercury (metal)
circumferences
liquid metals
Fermi level
Mercury
Liquid metals
free electrons
electrons
Scattering

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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Possible explanation for the conductance of a single quantum unit in metallic carbon nanotubes. / Choi, Hyoung Joon; Ihm, Jisoon; Yoon, Young Gui; Louie, Steven G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 60, No. 20, 01.01.1999, p. R14009-R14011.

Research output: Contribution to journalArticle

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