Elliptical orbits of bismuth surface electrons in a large magnetic field. The orientation and interference patterns of the electronic states reveal that the electrons prefer to occupy a single valley. Image created using a theoretical model of the data.
Credit: Ali Yazdani Laboratory, Princeton University
Researchers have made a finding that could help usher in new area of technology called ‘valleytronics.’ The study found that electrons in bismuth crystals prefer to collect in one valley rather than being distributed equally across valleys, setting up a type of electricity known as ferroelectricity. Energy valleys forming in crystals can trap single electrons. These valleys potentially could be used to store information, greatly enhancing what is capable with modern electronic devices.
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