  We demonstrate experimentally that in an asymmetric quantum well in presence
of quantizing magnetic field tilted in XZ plane, confining potential V(z) lifts
Landau level degeneracy related to position of the centers of electron
cyclotron orbits along X axis. This results in a transformation of the Landau
levels into the bands in which the electrons may possess nonzero directed
velocity along Y axis. We directly demonstrate that the electrons are spatially
separated along X axis depending on their velocity along Y axis that means
spontaneous one-dimensional electron fluxes flow in opposite directions along Y
axis even within the fully occupied bands. We also directly demonstrate that
the electrons possess nonzero electric dipole moment as a result of Lorentz
force effect on these one-dimensional fluxes. On the basis of these experiments
we put forward the concept of a directed-flux phase of condensed matter.
