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Spin-resolved imaging and spectroscopy of individual molecules with sub-molecular spatial resolution

Published online by Cambridge University Press:  15 July 2014

Jens Brede
Institute of Applied Physics and Interdisciplinary Nanoscience Center Hamburg, University of Hamburg, Germany;
Roland Wiesendanger
Department of Physics, University of Hamburg, Germany;
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Organic materials are fascinating and promising candidates for nanoscale spintronic devices and may open viable routes toward quantum computing. Previous experiments on spin transport in organic devices, through break junctions or spin valves, unveiled exciting new frontiers of molecular magnetism. However, much more effort is needed to understand the properties of organic/magnetic interfaces at a microscopic level. In this article, we show how spin-polarized scanning tunneling microscopy and spectroscopy (SP-STM/STS) can provide unprecedented insights into organic/magnetic interfaces as an initial step toward favorably tailoring such interfaces in order to increase device efficiency. Based on the unique combination of spin-sensitivity, atomic-scale spatial resolution, and high-energy resolution, SP-STM/STS has proven to be an invaluable method for exploring spatial and bias dependences of spin-polarized currents through individual molecules as well as for revealing individual spin-split molecular orbitals interacting with ferromagnetic substrates.

Research Article
Copyright © Materials Research Society 2014 

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