3D view of some of the structures built atom-by-atom from silver (small hillocks). A rectangular and a circular electron cage are seen in the top left quarter of the image. Photo: Lucas Schneider
3D view of some of the structures built atom-by-atom from silver (small hillocks). A rectangular and a circular electron cage are seen in the top left quarter of the image. Photo: Lucas Schneider - Researchers from the Department of Physics at Universität Hamburg, observed a quantum state that was theoretically predicted more than 50 years ago by Japanese theoreticians but so far eluded detection. By tailoring an artificial atom on the surface of a superconductor, the researchers succeeded in pairing the electrons of the so-called quantum dot, thereby inducing the smallest possible version of a superconductor. The work appears in the latest issue of the journal -Nature-. Usually electrons repel each other due to their negative charge. This phenomenon has a huge impact on many materials properties such as the electrical resistance.
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