Researchers have unveiled the spinaron effect, challenging traditional beliefs about magnetic interactions in quantum materials and potentially reshaping our understanding of theoretical quantum physics.
By harnessing the power of an intense external magnetic field and using an iron tip in the scanning tunneling microscope, the Würzburg physicists managed to determine the magnetic orientation of the cobalt’s spin. This spin isn’t rigid, but switches permanently back and forth, i.e. from “spin-up” to “spin-down” , and vice versa. This switching excites the copper electrons, a phenomenon called the spinaron effect.
The first experimental validation of the spinaron effect, courtesy of the Würzburg team, casts doubt on the Kondo effect. Until now, it was considered the universal model to explain the interaction between magnetic atoms and electrons in quantum materials such as the cobalt-copper duo.
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