Spin transport and bipolaron density in organic polymers

Details Spin transport and bipolaron density in organic polymers Spin transport and bipolaron density in organic polymers

2009-03-10

arxiv.org/abs/0903.1707v2

J. Phys.: Condens. Matter 21, 415302 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 2 figures, IOP style

Scientific paper

10.1088/0953-8984/21/41/415302

We present a theory for spin-polarized transport through a generic organic polymer connected to ferromagnetic leads with arbitrary angle theta between their magnetization directions, taking into account the polaron and bipolaron states as effective charge and spin carriers. Within a diffusive description of polaron-bipolaron transport including polaron-bipolaron conversion, we find that the bipolaron density depends on the angle theta. This is remarkable, given the fact that bipolarons are spinless quasiparticles, and opens a new way to probe spin accumulation in organic polymers.

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