Possible explanation for the conductance of a single quantum unit in metallic carbon nanotubes
- Authors
- Choi, Hyoung Joon; Ihm, Jisoon; Yoon, Young-Gui; Louie, Steven G.
- Issue Date
- Nov-1999
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.60, no.20, pp R14009 - R14011
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 60
- Number
- 20
- Start Page
- R14009
- End Page
- R14011
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/56826
- DOI
- 10.1103/PhysRevB.60.R14009
- ISSN
- 1098-0121
1550-235X
- Abstract
- The quantum conductance of a metallic carbon nanotube with one end immersed in a jellium metal is studied. We find that the incident pi*-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 (2e(2)/h) to the conductance. On the other hand, the incident pi-band electrons, with the p(z) 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. [S0163-1829(99)51044-8].
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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