Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)

MA 63.91: Poster

Freitag, 18. März 2011, 11:00–14:00, P2

Dr. — •Zhen Gang Zhu and Jamal Berakdar — Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany

We propose a new efficient way to control the spin dynamics in a quantum wire with spin orbit interaction via the application of sub-picosecond, linearly polarized electromagnetic pulses with appropriate shapes. If the electric field of the pulse is aligned along the direction of the wire, the carriers experience a momentum boost while keeping the spin coherence in the different spin channels. When the polarization of the pulse is perpendicular to the 2 dimensional plane in which the wire is engraved, a further dynamical spin precession is induced in addition to the static one. The former is comparable to the latter and can be tuned by changing the pulse field parameters, an effect utilizable for optically controlled spintronics devices