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We have studied magnetic field and temperature dependence of electron transport in chemical vapor deposition synthesized highly resistive multiwalled carbon nanotubes. The analysis of the weak-localization magnetoresistance according to electron-electron interaction theories leads to very small mean free paths, l<10nm. At lowest temperatures the sheet resistance is near RK=h/e². Both of these observations suggest that our samples are close to the strong-localization limit.
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Tarkiainen et al. (2004) studied this question.
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