Effect of correlations on electronic structure and transport across (001) Fe/MgO/Fe junctions

Article

关键词: MAGNETIC TUNNEL-JUNCTIONS;    ROOM-TEMPERATURE;    MAGNETORESISTANCE;    SPINTRONICS;    INTERFACES;    BARRIERS;   

DOI  :  10.1103/PhysRevB.85.174433

来源: SCIE

【 摘 要 】

We developed a parametrization of transmission probability that reliably captures essential elements of the tunneling process in magnetic tunnel junctions. The electronic structure of the Fe/MgO/Fe junction is calculated within the quasiparticle self-consistent GW approximation and used to evaluate transmission probability across (001) Fe/MgO interfaces. The transmission has a peak at +0.12 V, in excellent agreement with recent differential conductance measurements for electrodes with antiparallel spin. These findings confirm that the observed current-voltage characteristics are intrinsic to well-defined (001) Fe/MgO interfaces, in contrast to previous predictions based on the local spin-density approximation, and also that many-body effects are important to realistically describe electron transport across well-defined metal-insulator interfaces.

【 授权许可】

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