Shot noise in magnetic tunnel junctions from first principles

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

Research output: Contribution to journalArticlepeer-review

15 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 languageEnglish
Article number020408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number2
DOIs
Publication statusPublished - 2012 Jul 26

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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