Creating a 'Tuning Fork' for Electrons (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Like the classical tuning fork slung from guitar strings in this photo, scientists used a device that worked like a microwave tuning fork to switch a fundamental property of electrons on demand in a silicon-bismuth sample developed at Berkeley Lab. Credit Credit: Flickr/Pierre Guinoiseau Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.