Fig 3 (IMAGE) Diamond Light Source Caption Dispersion of magnetic excitations in NdNiO2 (Left) and La2CuO4 (Right) with the corresponding fits to the prediction of the linear spin wave theory. Credit Diamond Light Source 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.