First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions

Yan Wang; Zhong Yi Lu; X. G. Zhang; X. F. Han

doi:10.1103/PhysRevLett.97.087210

First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions

Yan Wang, Zhong Yi Lu, X. G. Zhang, X. F. Han

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

41 Scopus citations

Abstract

Quantum well (QW) resonances in Fe(001)/MgO/Fe/MgO/Fe double barrier magnetic tunnel junctions are calculated from first principles. By including the Coulomb blockade energy due to the finite size islands of the middle Fe film, we confirm that the oscillatory differential resistance observed in a recent experiment originates from the QW resonances from the Δ1 band of the Fe majority-spin channel. The primary source of smearing at low temperatures is shown to be the variation of the Coulomb blockade energy.

Original language	English
Article number	087210
Journal	Physical Review Letters
Volume	97
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.97.087210
State	Published - 2006
Externally published	Yes

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10.1103/PhysRevLett.97.087210

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title = "First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions",

abstract = "Quantum well (QW) resonances in Fe(001)/MgO/Fe/MgO/Fe double barrier magnetic tunnel junctions are calculated from first principles. By including the Coulomb blockade energy due to the finite size islands of the middle Fe film, we confirm that the oscillatory differential resistance observed in a recent experiment originates from the QW resonances from the Δ1 band of the Fe majority-spin channel. The primary source of smearing at low temperatures is shown to be the variation of the Coulomb blockade energy.",

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AU - Zhang, X. G.

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N2 - Quantum well (QW) resonances in Fe(001)/MgO/Fe/MgO/Fe double barrier magnetic tunnel junctions are calculated from first principles. By including the Coulomb blockade energy due to the finite size islands of the middle Fe film, we confirm that the oscillatory differential resistance observed in a recent experiment originates from the QW resonances from the Δ1 band of the Fe majority-spin channel. The primary source of smearing at low temperatures is shown to be the variation of the Coulomb blockade energy.

AB - Quantum well (QW) resonances in Fe(001)/MgO/Fe/MgO/Fe double barrier magnetic tunnel junctions are calculated from first principles. By including the Coulomb blockade energy due to the finite size islands of the middle Fe film, we confirm that the oscillatory differential resistance observed in a recent experiment originates from the QW resonances from the Δ1 band of the Fe majority-spin channel. The primary source of smearing at low temperatures is shown to be the variation of the Coulomb blockade energy.

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DO - 10.1103/PhysRevLett.97.087210

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First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions

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