Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 46: Surface magnetism I (jointly with MA)

O 46.6: Vortrag

Mittwoch, 16. März 2011, 12:30–12:45, CHE 184

Realizing Spin Logic Atom by Atom — •Alexander Khajetoorians, Bruno Chilian, Jens Wiebe, and Roland Wiesendanger — Institute of Applied Physics, Hamburg University, Jungiusstrasse 11, 20355 Hamburg, Germany

Scanning tunneling microscopy (STM) has emerged as a leading technique which can address single atom magnetism with high energy and spatial resolution. With the development of sub-Kelvin high-magnetic field STM, two complementary methods, namely spin-polarized scanning tunneling spectroscopy (SP-STS) and inelastic STS (ISTS), can address the fundamental properties of individual magnetic impurities at surfaces [1-2]. We use a map of the distance-dependent RKKY interaction between Fe atoms on Cu(111) obtained by SP-STS to engineer complex magnetic nanostructures with tailored magnetic properties with atomic manipulation. By combining constructed anti-ferromagnetic structures with spin frustration, we realize an atomic-scale logic device which functions solely on the spin-degrees of freedom of its magnetic constituents.
[1] A. A. Khajetoorians, B. Chilian, J. Wiebe, S. Schuwalow, F. Lechermann, and R. Wiesendanger, Nature 467, 1084 (2010).
[2] A. A. Khajetoorians, S. Lounis, B. Chilian, A. T. Costa, L. Zhou, D. Mills, J. Wiebe, and R. Wiesendanger, arXiv:1010.1284v2 (2010).