Electronic ring currents in benzene, induced by an external magnetic field perpendicular to the plane.
Complementarily to the electronic density distribution, the induced currents show how the electrons react on magnetic perturbations. The surprising property of this snapshot is that within the plane defined by the positions of the atoms, the inner current (inside the ring) has the inverse orientation compared to the outer one. When leaving the molecular plane, this feature disappears.
MPEG movie (662 Kb)
Data simulation by Daniel Sebastiani, Max Planck Institute (Germany)