Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 116: Spintronics (incl. Quantum Dynamics) (jointly with MA, HL)
TT 116.4: Vortrag
Freitag, 20. März 2015, 10:30–10:45, EB 202
Transmission through correlated CunCoCun heterostructures — •Liviu Chioncel1, Cristian Morari2, Ivan Runger3, Andrea Drogetti3, Andreas Oestlin4, Ulrich Eckern5, and Andrei Postnikov6 — 1Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D - 86135 Augsburg, Germany — 2National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath, RO-400293 Cluj Napoca, Romania — 3School of Physics and CRANN, Trinity College, Dublin 2, Ireland — 4Department of Materials Science and Engineering, Applied Materials Physics, KTH Royal Institute of Technology, Stockholm SE - 100 44, Sweden — 5Theoretical Physics II, Institute of Physics, University of Augsburg, D - 86135 Augsburg, Germany — 6LCP-A2MC, Institute Jean Barriol, University of Lorraine 1, Bd Arago, F - 57078 Metz, France
We study the effects of local electronic interactions and finite temperatures upon the transmission across the Cu4CoCu4 metallic heterostructure in a combined density functional and dynamical mean field theory. We show that the total transmission at the Fermi level is reduced as the electronic correlations are taken into account via a local but dynamic self-energy, whereby such a reduction is more pronounced in the minority spin channel. Consequently, the spin polarization of the transmission increases. Our results also demonstrate that the enhancement in spin contrast is in mainly driven by interaction rather than finite temperature fluctuations.