Shot noise in magnetic tunnel junctions from first principles

Details Shot noise in magnetic tunnel junctions from first principles Shot noise in magnetic tunnel junctions from first principles

2011-11-11

arxiv.org/abs/1111.2681v1

Physics

Condensed Matter

Materials Science

5 pages,5 figures

Scientific paper

We compute the shot noise in ballistic and disordered Fe/MgO/Fe tunnel junctions by a wave function-matching method. For tunnel barriers with no more than 5 atomic layers we find a suppression of the Fano factor as a function of the magnetic configuration. For thicker MgO barriers the shot noise is suppressed up to a threshold bias indicating the onset of resonant tunneling. We find excellent agreement with recent experiments when interface disorder is taken into account

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