Tunnel magnetoresistance due to Coulomb blockade effects in quasi-one dimensional polymer nanofibers

Details Tunnel magnetoresistance due to Coulomb blockade effects in quasi-one dimensional polymer nanofibers Tunnel magnetoresistance due to Coulomb blockade effects in quasi-one dimensional polymer nanofibers

2009-12-08

arxiv.org/abs/0912.1428v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures

Scientific paper

We report on the low temperature tunnel magnetoresistance (MR) in quasi one-dimensional (1D) nanofibers made of conjugated polymers. The MR voltage bias dependence reveals an enhancement (at low biases) and the oscillatory behavior at temperatures below 10 K. The low temperature isotropic MR behavior has been attributed to the charging effects in the polymer nanofiber which considered as an array of small conducting regions separated by nano barriers. These effects at low temperatures lead to the single electron tunneling represented by the Coulomb blockade regime as well as to an enhancement and oscillation of the tunnel MR.

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