Emergence of spin structure in quantum wires under strong magnetic fields

We study the effects of a perpendicular magnetic field on the spin and charge structure of a quantum wire. Using momentum resolved tunneling between two parallel wires we measure the dispersion relation for different perpendicular magnetic fields. We find that as the magnetic field increases, charges with opposing spin separate in the cross section of the wire giving rise to strips of polarized and unpolarized electrons. We argue that this structure results from the exchange interaction between electrons in the wire. We discuss the applicability of these results to the structure of Quantum Hall edge states.