Shot noise in magnetic tunnel junctions from first principles

Kai Liu; Ke Xia; Gerrit E.W. Bauer

doi:10.1103/PhysRevB.86.020408

Shot noise in magnetic tunnel junctions from first principles

Kai Liu, Ke Xia, Gerrit E.W. Bauer

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

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.

Original language	English
Article number	020408
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	86
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.86.020408
Publication status	Published - 2012 Jul 26

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.86.020408

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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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AB - 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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Shot noise in magnetic tunnel junctions from first principles

Abstract

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