Bilayer system (IMAGE) University of Bonn Caption The system: A crystal lattice made of light traps atoms in several bilayer sheets. Tomographic images show the (spin-) densities in a single layer. They provide information about the magnetic ordering of the atoms. The image on the right shows the density of one layer averaged over twelve realizations (orange red). Credit © Marcell Gall, Nicola Wurz et al./ Nature Usage Restrictions Please use this image only in connection with the press release. 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.