A Spin Chain (IMAGE) Singapore University of Technology and Design Caption This is a spin chain in which spin interactions are strong in the left half (orange arrows) and weak in the right half (blue arrows). A spin current from left to right (green arrowed line) is possible, but not in the opposite direction (red arrowed line). A very large rectification is the result of this. Credit SUTD Usage Restrictions Image should be used with appropriate caption. 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.