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Title: Nonlinear transport and localization in single-walled carbonnanotubes

Abstract

We have measured the electrical transport properties of mats of single-walled carbon nanotubes (SWNTs) 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 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 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>700nm. Implications for the electron-phonon mean free path are discussed.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Director. Office of Science. Office of Basic EnergySciences. Materials Science Division; National Science Foundation GrantDMR95-20554
OSTI Identifier:
878511
Report Number(s):
LBNL-48755
Journal ID: ISSN 0379-6779; SYMEDZ; R&D Project: 506701; BnR: KC0202030; TRN: US0602402
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Synthetic Metals
Additional Journal Information:
Journal Volume: 103; Related Information: Journal Publication Date: June 1999; Journal ID: ISSN 0379-6779
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARBON; DIMENSIONS; ELECTRIC FIELDS; MAGNETIC FIELDS; MAGNETORESISTANCE; MEAN FREE PATH; NANOTUBES; TRANSPORT; Trnasport measurements conductivity Hall effectmagnetotransport Fullerenes and derivatives

Citation Formats

Fuhrer, M S, Holmes, W, Richards, P L, Delaney, P, Louie, S G, and Zettl, A. Nonlinear transport and localization in single-walled carbonnanotubes. United States: N. p., 1999. Web. doi:10.1016/S0379-6779(98)00305-1.
Fuhrer, M S, Holmes, W, Richards, P L, Delaney, P, Louie, S G, & Zettl, A. Nonlinear transport and localization in single-walled carbonnanotubes. United States. https://doi.org/10.1016/S0379-6779(98)00305-1
Fuhrer, M S, Holmes, W, Richards, P L, Delaney, P, Louie, S G, and Zettl, A. 1999. "Nonlinear transport and localization in single-walled carbonnanotubes". United States. https://doi.org/10.1016/S0379-6779(98)00305-1.
@article{osti_878511,
title = {Nonlinear transport and localization in single-walled carbonnanotubes},
author = {Fuhrer, M S and Holmes, W and Richards, P L and Delaney, P and Louie, S G and Zettl, A},
abstractNote = {We have measured the electrical transport properties of mats of single-walled carbon nanotubes (SWNTs) 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 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 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>700nm. Implications for the electron-phonon mean free path are discussed.},
doi = {10.1016/S0379-6779(98)00305-1},
url = {https://www.osti.gov/biblio/878511}, journal = {Synthetic Metals},
issn = {0379-6779},
number = ,
volume = 103,
place = {United States},
year = {Mon Mar 15 00:00:00 EST 1999},
month = {Mon Mar 15 00:00:00 EST 1999}
}