Dresden 2011 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 31: TR: Nanoelectronics II - Spintronics and Magnetotransport 1 (jointly with HL and MA)

TT 31.1: Hauptvortrag

Mittwoch, 16. März 2011, 10:30–11:00, HSZ 301

New insights into the spin Hall effect — •Peter Schwab — Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany

The spin Hall effect allows to generate spin polarized currents without the need of magnetic materials or magnetic fields. Despite intensive theoretical and experimental efforts over the last years the microscopic mechanism that is responsible for the effect is in many cases not clear. Within a kinetic euqations approach we studied in detail the coupled dynamics of spin and charge currents in the two-dimensional electron gas and found that, surprisingly, the spin Hall effect and the inverse spin Hall effect are of different microscopic origin [1,2]. Recent experiments aim for an all-electrical measurement of the spin Hall effect. We will comment on an attempt to detect the spin Hall effect through the non-local voltage in H-shaped nanostructures, where an unexpected sign-change of the non-local voltage was observed when lowering the temperature.

[1] R. Raimondi, P. Schwab, EPL 87, 37008 (2009)
P. Schwab, R. Raimondi, C. Gorini, EPL 90, 67004 (2010).