Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 49: Spintronics (organized by MA)

TT 49.9: Vortrag

Dienstag, 1. April 2014, 15:45–16:00, HSZ 401

Transport properties of multiferroic tunnel junctions in an embedded Green-function approach — •Andera Neroni, Daniel Wortmann, Ersoy Sasioglu, Stefan Blügel, and Marjana Ležaić — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

Multiferroics tunnel junctions are promising structures for spintronic devices due to their transport properties. From the theoretical point of view the study of transport in Metal/Ferroelectric/Metal needs to deal with several degrees of freedom. Structural distortions at the interface, polarization and magnetization directions, presence of oxides at the interface and strong correlations must be taken into account. We focus on the tunneling properties of a Fe/BTO/Fe barrier obtained in an embedded Green-function approach [1] implemented with the framework of the full-potential linearized augmented plane-wave (FLAPW) method FLEUR [2]. Electronic charge self-consistency is achieved in the same approach. Strong correlations are taken into account employing the LDA+U approach within the framework of the density functional theory (DFT) with a Hubbard U parameter determined by constrained random phase approximation (cRPA) [3].

Work is supported by Helmholtz Young Investigators Group Program VH-NG-409.

[1] www.flapw.de

[2] D. Wortmann, H. Ishida, and S. Blügel, PRB 65, 165103 (2002)

[3] E. Şaşioğlu, C. Friedrich, and S. Blügel, PRB 83, 121101(R) (2011)