Berlin 2015 – scientific programme
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MA: Fachverband Magnetismus
MA 39: Spin-dependent Transport Phenomena I
MA 39.1: Talk
Thursday, March 19, 2015, 09:30–09:45, H 0112
Unified theory for charge, spin and angular momentum excitations — •Filipe Souza Mendes Guimaraes1,2, Antonio Tavares da Costa Jr1, Roberto Bechara Muniz1, Manuel dos Santos Dias2, and Samir Lounis2 — 1Instituto de Física, Universidade Federal Fluminense, Niterói, Brazil — 2Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
The investigation of phenomena involving the spin and charge of the electron, called spintronics, has the potential to generate and enhance tools for the development of devices with low power consumption and fast switching speeds, as well as technologies that may be mass-produced. Polarized currents and angular momentum currents may be used to transfer information more efficiently than the conventional charge currents. We have developed a fully quantum mechanical approach that allows us to study charge, spin and angular momentum excitations. This method takes into account realistic electronic structures obtained from first principles calculations. We show that spin, charge and angular momentum currents and disturbances can be expressed in terms of generalized susceptibilities. Results on static and dynamic quantities related to the Spin Hall Effect and Inverse Spin Hall Effect for ultrathin films of Pt and Co/Pt will be presented.