Nonlinear transport and localization in single-walled carbon nanotubes

M. S. Fuhrer; W. Holmes; P. L. Richards; P. Delaney; S. G. Louie; A. Zettl

doi:10.1016/S0379-6779(98)00305-1

Nonlinear transport and localization in single-walled carbon nanotubes

M. S. Fuhrer, W. Holmes, P. L. Richards, P. Delaney, S. G. Louie, A. Zettl

Research output: Contribution to journal › Conference article › Research › peer-review

45 Citations (Scopus)

Abstract

We have measured the electrical transport properties of mats of single-walled carbon nanotubes (SWNT) as a function of applied electric and magnetic fields. We find that at low temperatures the resistance as a function of temperature R(T) follows the Mott variable range hopping (VRH) formula for hopping in three dimensions. Measurement of the electric field dependence of the resistance R(E) allows for the determination of the Bohr radius of a localized state a = 700nm. The magnetoresistance (MR) of SWNT mat samples is large and negative at all temperatures and fields studied. The low field negative MR is proportional to H², in agreement with variable range hopping in two or three dimensions. 3D VRH indicates good intertube contacts, implying that the localization is due to the disorder experienced by the individual tubes. The 3D localization radius gives a measure of the 1D localization length on the individual tubes, which we estimate to be >700 nm. Implications for the electron-phonon mean free path are discussed.

Original language	English
Pages (from-to)	2529-2532
Number of pages	4
Journal	Synthetic Metals
Volume	103
Issue number	1-3
DOIs	https://doi.org/10.1016/S0379-6779(98)00305-1
Publication status	Published - 24 Jun 1999
Externally published	Yes
Event	Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier Duration: 12 Jul 1998 → 18 Jul 1998

Access to Document

10.1016/S0379-6779(98)00305-1

Link to publication in Scopus

Cite this

@article{5def9a14199a496694fbc1ca54d094e4,

title = "Nonlinear transport and localization in single-walled carbon nanotubes",

abstract = "We have measured the electrical transport properties of mats of single-walled carbon nanotubes (SWNT) as a function of applied electric and magnetic fields. We find that at low temperatures the resistance as a function of temperature R(T) follows the Mott variable range hopping (VRH) formula for hopping in three dimensions. Measurement of the electric field dependence of the resistance R(E) allows for the determination of the Bohr radius of a localized state a = 700nm. The magnetoresistance (MR) of SWNT mat samples is large and negative at all temperatures and fields studied. The low field negative MR is proportional to H2, in agreement with variable range hopping in two or three dimensions. 3D VRH indicates good intertube contacts, implying that the localization is due to the disorder experienced by the individual tubes. The 3D localization radius gives a measure of the 1D localization length on the individual tubes, which we estimate to be >700 nm. Implications for the electron-phonon mean free path are discussed.",

author = "Fuhrer, {M. S.} and W. Holmes and Richards, {P. L.} and P. Delaney and Louie, {S. G.} and A. Zettl",

year = "1999",

month = jun,

day = "24",

doi = "10.1016/S0379-6779(98)00305-1",

language = "English",

volume = "103",

pages = "2529--2532",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier",

number = "1-3",

note = "Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) ; Conference date: 12-07-1998 Through 18-07-1998",

}

TY - JOUR

T1 - Nonlinear transport and localization in single-walled carbon nanotubes

AU - Fuhrer, M. S.

AU - Holmes, W.

AU - Richards, P. L.

AU - Delaney, P.

AU - Louie, S. G.

AU - Zettl, A.

PY - 1999/6/24

Y1 - 1999/6/24

N2 - We have measured the electrical transport properties of mats of single-walled carbon nanotubes (SWNT) as a function of applied electric and magnetic fields. We find that at low temperatures the resistance as a function of temperature R(T) follows the Mott variable range hopping (VRH) formula for hopping in three dimensions. Measurement of the electric field dependence of the resistance R(E) allows for the determination of the Bohr radius of a localized state a = 700nm. The magnetoresistance (MR) of SWNT mat samples is large and negative at all temperatures and fields studied. The low field negative MR is proportional to H2, in agreement with variable range hopping in two or three dimensions. 3D VRH indicates good intertube contacts, implying that the localization is due to the disorder experienced by the individual tubes. The 3D localization radius gives a measure of the 1D localization length on the individual tubes, which we estimate to be >700 nm. Implications for the electron-phonon mean free path are discussed.

AB - We have measured the electrical transport properties of mats of single-walled carbon nanotubes (SWNT) as a function of applied electric and magnetic fields. We find that at low temperatures the resistance as a function of temperature R(T) follows the Mott variable range hopping (VRH) formula for hopping in three dimensions. Measurement of the electric field dependence of the resistance R(E) allows for the determination of the Bohr radius of a localized state a = 700nm. The magnetoresistance (MR) of SWNT mat samples is large and negative at all temperatures and fields studied. The low field negative MR is proportional to H2, in agreement with variable range hopping in two or three dimensions. 3D VRH indicates good intertube contacts, implying that the localization is due to the disorder experienced by the individual tubes. The 3D localization radius gives a measure of the 1D localization length on the individual tubes, which we estimate to be >700 nm. Implications for the electron-phonon mean free path are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0033138014&partnerID=8YFLogxK

U2 - 10.1016/S0379-6779(98)00305-1

DO - 10.1016/S0379-6779(98)00305-1

M3 - Conference article

AN - SCOPUS:0033138014

VL - 103

SP - 2529

EP - 2532

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

IS - 1-3

T2 - Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98)

Y2 - 12 July 1998 through 18 July 1998

ER -