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 journal Nature.
Today, the continuous downscaling of electronic devices heavily guides investigations on how superconductivity can be induced into much smaller structures at the nanoscale.
To that end, researchers led by PD Dr. Jens Wiebe from the Institute for Nanostructure and Solid State Physics locked the electrons into tiny cages that they built from silver, atom-by-atom. By coupling the locked electrons to an elemental superconductor, the electrons inherited the tendency towards pairing from the superconductor.
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