A flower-shaped structure only a few micrometres in size made of a nickel-iron alloy can concentrate and locally enhance magnetic fields. The size of the effect can be controlled by varying the ...

However, due to the presence of strong magnetic fields, the electron energies become confined into discrete energy levels. This process dramatically enhances the interaction between the electrons ...

"Our experimental system is a photoemission electron microscope, so magnetic fields deflect the electrons and make the experiments difficult," says Valencia. "The maximum magnetic field we can ...