  We consider the effect of electron-electron interaction on the density of
states of disordered paramagnetic conductor in the presence of spin
accumulation and magnetic field. We show that interaction correction to
electron density of states of the paramagnet may exhibit singularities at
energies corresponding to the difference between chemical potentials of
electrons with opposite spins. We also discuss correlation effects on
conductivity in metallic as well as in hopping regimes and show that spin
accumulation leads to the negative magnetoconductivity.

Mesoscale and Nanoscale Physics