Kotissek, Philipp and Bailleul, M. and Sperl, Matthias and Spitzer, A. and Schuh, Dieter and Wegscheider, Werner and Back, Christian and Bayreuther, Günther (2007) Cross-sectional imaging of spin injection into a semiconductor. Nature Physics 3, pp. 872-877.
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Recent discoveries of phenomena that relate electronic transport in solids to the spin angular momentum of the electrons are the fundamentals of spin electronics (spintronics). The first proposed conceptual spintronic device, the spin field-effect transistor—which has not yet been successfully implemented—requires the creation and detection of spin-polarized currents in a semiconductor. Whereas electrical spin injection from a ferromagnetic metal into GaAs has been achieved recently, the detection techniques used up to now have drawbacks like the requirement of large magnetic fields or limited information about the spin polarization in the semiconductor. Here we introduce a method that, by observation across a cleaved edge, enables us to directly visualize fully remanent electrical spin injection into bulk GaAs from a ferromagnetic contact, to image the spin-density distribution in the semiconductor in a cross-sectional view and to separate the effects of spin diffusion and electron drift.
|Date:||7 October 2007|
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back|
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Günther Bayreuther
Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||24 Mar 2010 10:31|
|Last Modified:||06 Jul 2010 11:40|