Kondo Effect in Quantum Dots

In some metals, the resistivity goes up when the temperature is lowered, instead of going down. This unusual phenomenonon is called the Kondo effect after its discoverer who explained it in bulk metals more than 60 years ago. In his Perspective, Inoshita discusses recent results from groups at the Massachusetts Institute of Technology, the Weizmann Institute, and Delft University in which the Kondo effect has been observed in single-electron quantum dot structures. The new findings support theoretical predictions and establish a system for future study of Kondo physics in small structures.