Illustration of the Spin Valve (IMAGE) University of Basel Caption Both quantum dots (dashed ellipses) on the nanowire are tuned by nanomagnets (brown bars) such that they only allow electrons with an "up" spin to pass. If the orientation of one of the magnets is changed, the current flow is suppressed. Credit University of Basel, Department of Physics Usage Restrictions Only to be used in reporting on research by the University of Basel 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.