Surprising electronic-magnetic properties of closed packed organized organic layers |
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Authors: | Z Vager G Leitus R Naaman |
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Institution: | a Department of Particle Physics, Weizmann Institute, Rehovot 76100, Israel b Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel c Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel |
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Abstract: | Cooperative effects generate new electronic and magnetic properties in closed packed organized organic layers. In layers made from chiral molecules, unexpectedly large electronic dichroism is observed, which manifests itself as spin specific electron transmission. For many thiolated molecules self-assembled on gold, a surprisingly large ferromagnetism is observed. All the observations can be rationalized by assuming orbital ferromagnetism of the organic thin layer. This is a new type of magnetism that is caused by the formation of closed packed layers of organic molecules on metal. In particular, charge transfer occurs between the substrate and the adsorbed layer. This charge is responsible for the appearance of magnetism. |
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