At http://www.livescience.com/23639-electron-quantum-landau-levels-imaged.html

Electrons' Elusive Hideouts Imaged for First Time

by Clara Moskowitz, LiveScience Senior Writer

Date: 02 October 2012 Time: 02:51 PM ET

This experimentally imaged photo is the first to show Landau Level 1, a circular orbit for electrons inside a strong magnetic field.
CREDIT: University of Warwick

For the first time, scientists have peered down to the level of a single electron and observed quantum states that had only been theorized before.

Researchers imaged the magnetic orbits of electrons called Landau levels, which were predicted in 1930 by Nobel Prize winner Lev Landau. These orbits represent the curved paths electrons travel when exposed to very strong magnetic fields.

Previously, scientists had confirmed the levels exist by measuring the changes in electric current that result when electrons switch from one Landau level to another. However, no one has been able to see these levels until... ( more at http://www.livescience.com/23639-electron-quantum-landau-levels-imaged.html )