Berlin 2015 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 94: Spin-Dependent Transport Phenomena I (organized by MA)

TT 94.1: Talk

Thursday, March 19, 2015, 09:30–09:45, H 0112

Unified theory for charge, spin and angular momentum excitations — •Filipe Souza Mendes Guimaraes^1,2, 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.