Changes in Nesting Condition (IMAGE) Institute for Basic Science Caption Before and after the attachment of alkaline metals to the surface of iron-based, pniktogen superconductors. (a) Quantity of momentum of electrons (X) and kinetic energy of electrons (Y) before and after the electron doping : electron doping has changed the distribution of electron kinetic energy. (b) Fermi surface data before and after the electron doping: nesting condition has been weakened. Credit IBS 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.