Shot noise in magnetic tunnel junctions from first principles

Journal article (2012)
Department
Quantum Nanoscience (AS) (TU Delft)
Copyright: © 2012 American Physical Society
DOI: https://doi.org/doi:10.1103/PhysRevB.86.020408
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Published Date

26-07-2012

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Source:

Physical Review B, 86 (2), 2012

Faculty

Applied Sciences

Department

Quantum Nanoscience

Abstract

We compute the shot noise in ballistic and disordered Fe|MgO|Fe tunnel junctions by a wave-function-matching method. For tunnel barriers with ?5 atomic layers we find a suppression of the Fano factor as a function of the magnetic configuration. In the antiparallel configuration the shot noise is full up to a threshold bias that indicates the onset of resonant tunneling. We find excellent agreement with recent experiments when interface disorder is taken into account.

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