Enhancement of carrier hopping by doping in single walled carbon nanotube films

Takumi Takano; Taishi Takenobu; Yoshihiro Iwasa

doi:10.1143/JPSJ.77.124709

Enhancement of carrier hopping by doping in single walled carbon nanotube films

Takumi Takano^*, Taishi Takenobu, Yoshihiro Iwasa

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

We report the doping dependence of the transport properties of single walled carbon nanotube (SWNT) films doped with organic molecules in the low temperature. The temperature dependence of the resistance and the magnetoresistance of SWNT films are investigated systematically, and well explained by two-dimensional variable range hopping (2D-VRH) conduction scheme. We found that the magnetoresistance is dramatically reduced upon doping, and analysis based on 2D-VRH theory revealed that the sheet density of states at the Fermi level showed monotonic increase with increasing of carrier density. These results indicate that the carrier hopping in SWNT film is enhanced by the carrier doping.

Original language	English
Article number	124709
Journal	Journal of the Physical Society of Japan
Volume	77
Issue number	12
DOIs	https://doi.org/10.1143/JPSJ.77.124709
Publication status	Published - 2008 Dec
Externally published	Yes

Keywords

Carbon nanotube
Carrier doping
Magnetoresistance
Molecule encapsulation
Variable range hopping

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.77.124709

Cite this

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title = "Enhancement of carrier hopping by doping in single walled carbon nanotube films",

abstract = "We report the doping dependence of the transport properties of single walled carbon nanotube (SWNT) films doped with organic molecules in the low temperature. The temperature dependence of the resistance and the magnetoresistance of SWNT films are investigated systematically, and well explained by two-dimensional variable range hopping (2D-VRH) conduction scheme. We found that the magnetoresistance is dramatically reduced upon doping, and analysis based on 2D-VRH theory revealed that the sheet density of states at the Fermi level showed monotonic increase with increasing of carrier density. These results indicate that the carrier hopping in SWNT film is enhanced by the carrier doping.",

keywords = "Carbon nanotube, Carrier doping, Magnetoresistance, Molecule encapsulation, Variable range hopping",

author = "Takumi Takano and Taishi Takenobu and Yoshihiro Iwasa",

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doi = "10.1143/JPSJ.77.124709",

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AU - Takano, Takumi

AU - Takenobu, Taishi

AU - Iwasa, Yoshihiro

PY - 2008/12

Y1 - 2008/12

N2 - We report the doping dependence of the transport properties of single walled carbon nanotube (SWNT) films doped with organic molecules in the low temperature. The temperature dependence of the resistance and the magnetoresistance of SWNT films are investigated systematically, and well explained by two-dimensional variable range hopping (2D-VRH) conduction scheme. We found that the magnetoresistance is dramatically reduced upon doping, and analysis based on 2D-VRH theory revealed that the sheet density of states at the Fermi level showed monotonic increase with increasing of carrier density. These results indicate that the carrier hopping in SWNT film is enhanced by the carrier doping.

AB - We report the doping dependence of the transport properties of single walled carbon nanotube (SWNT) films doped with organic molecules in the low temperature. The temperature dependence of the resistance and the magnetoresistance of SWNT films are investigated systematically, and well explained by two-dimensional variable range hopping (2D-VRH) conduction scheme. We found that the magnetoresistance is dramatically reduced upon doping, and analysis based on 2D-VRH theory revealed that the sheet density of states at the Fermi level showed monotonic increase with increasing of carrier density. These results indicate that the carrier hopping in SWNT film is enhanced by the carrier doping.

KW - Carbon nanotube

KW - Carrier doping

KW - Magnetoresistance

KW - Molecule encapsulation

KW - Variable range hopping

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Enhancement of carrier hopping by doping in single walled carbon nanotube films

Abstract

Keywords

ASJC Scopus subject areas

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