Departmental Papers (ESE)

Document Type

Journal Article

Date of this Version

September 2006

Comments

Postprint version. Published in Applied Physics Letters, Volume 89, Issue 12, Article 123119, September 2006, 3 pages.
Publisher URL: http://dx.doi.org/10.1063/1.2338573

Abstract

A highly disordered pregraphitic carbon nanofiber with the product of its quasi-Fermi wave vector and mean free path close to 1 was fabricated using electrospinning technique. Strong localization made the conductivity vary with temperature as σ [proportional to]Τ-1/2 from 300 to 5 K, suggesting variable range hopping as the conductivity mechanism, and resulted in a large negative magnetoresistance from 300 K down to 1.9 K that can still be quantitatively described using weak localization and electron interaction models.

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Date Posted: 07 December 2006

This document has been peer reviewed.