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Zernike Institute for Advanced Materials Colloquium Roland Wiesendanger


03 November 2011 FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen
Speaker: Prof. Dr. Roland Wiesendanger

Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg , Germany

Title: Atomic spin logic devices
Date: Thu Nov 3, 2011
Start: 16.00 (Doors open and coffee available at 15.30)
Location: FWN-Building 5111.0080


Spin-Polarized Scanning Tunneling Microscopy (SP-STM) provides new insight into spin structures at a length scale and a sensitivity level which are inaccessible by other magnetic-sensitive measurement techniques. The combination of atomic resolution in direct space, single spin sensitivity, and high energy resolution nowadays offers unique possibilities for probing spin-dependent states and interactions in natural or artificially created nanostructures. Moreover, spin-state manipulation based on spin-current induced switching and spin-state read-out by SP-STM methods offers another novel exciting research direction. Ultimately, a new type of magnetic recording technology might be developed based on spin-state writing and read-out rather than using magnetic stray fields. While the detection of magnetic stray fields becomes and more and more difficult as the magnetic bit size is further reduced, the concept of spin manipulation and spin-state determination has already been demonstrated down to the atomic level using SP-STM based techniques. Moreover, the recent demonstration of atomic-scale spin logic devices based on the combination of atomic manipulation and spin-sensitive read-out by SP-STM offers great potential for future information technologies using spins rather than charges for computation and information transmission at the atomic level.



Nano-scale magnetic Fe-islands grown on a stepped W(110) surface. The magnetization directions are color coded and have been determined by spin-polarized STM.




Last modified:22 October 2012 2.30 p.m.