Abstract
We present a new mechanism of carbon nanotube superconductivity that originates from edge states which are specific to graphene. Using on-site and boundary deformation potentials which do not cause bulk superconductivity, we obtain an appreciable transition temperature for the edge state. As a consequence, a metallic zigzag carbon nanotube having open boundaries can be regarded as a natural superconductor/normal metal/superconductor junction system, in which superconducting states are developed locally at both ends of the nanotube and a normal metal exists in the middle. In this case, a signal of the edge state superconductivity appears as the Josephson current which is sensitive to the length of a nanotube and the position of the Fermi energy. Such a dependence distinguishs edge state superconductivity from bulk superconductivity.
| Original language | English |
|---|---|
| Article number | 033702 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 76 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 2007 |
| Externally published | Yes |
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Keywords
- Carbon nanotube
- Edge state
- Graphene
- Superconducivity
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Theory of superconductivity of carbon nanotubes and graphene. / Sasaki, Ken Ichi; Jiang, Jie; Saito, Riichiro; Onari, Seiichiro; Tanaka, Yukio.
In: Journal of the Physical Society of Japan, Vol. 76, No. 3, 033702, 03.2007.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Theory of superconductivity of carbon nanotubes and graphene
AU - Sasaki, Ken Ichi
AU - Jiang, Jie
AU - Saito, Riichiro
AU - Onari, Seiichiro
AU - Tanaka, Yukio
PY - 2007/3
Y1 - 2007/3
N2 - We present a new mechanism of carbon nanotube superconductivity that originates from edge states which are specific to graphene. Using on-site and boundary deformation potentials which do not cause bulk superconductivity, we obtain an appreciable transition temperature for the edge state. As a consequence, a metallic zigzag carbon nanotube having open boundaries can be regarded as a natural superconductor/normal metal/superconductor junction system, in which superconducting states are developed locally at both ends of the nanotube and a normal metal exists in the middle. In this case, a signal of the edge state superconductivity appears as the Josephson current which is sensitive to the length of a nanotube and the position of the Fermi energy. Such a dependence distinguishs edge state superconductivity from bulk superconductivity.
AB - We present a new mechanism of carbon nanotube superconductivity that originates from edge states which are specific to graphene. Using on-site and boundary deformation potentials which do not cause bulk superconductivity, we obtain an appreciable transition temperature for the edge state. As a consequence, a metallic zigzag carbon nanotube having open boundaries can be regarded as a natural superconductor/normal metal/superconductor junction system, in which superconducting states are developed locally at both ends of the nanotube and a normal metal exists in the middle. In this case, a signal of the edge state superconductivity appears as the Josephson current which is sensitive to the length of a nanotube and the position of the Fermi energy. Such a dependence distinguishs edge state superconductivity from bulk superconductivity.
KW - Carbon nanotube
KW - Edge state
KW - Graphene
KW - Superconducivity
UR - http://www.scopus.com/inward/record.url?scp=33947266413&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947266413&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.76.033702
DO - 10.1143/JPSJ.76.033702
M3 - Article
AN - SCOPUS:33947266413
VL - 76
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 3
M1 - 033702
ER -