Correlation effects in disordered conductors with spin accumulation

We consider the effect of electron-electron interaction on the density of states of a 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.

Figure 1

Hartree (left) and exchange electronic self-energy diagrams for the calculation of density of states. Wavy lines define the Coulomb interaction, solid lines stand for the electron Green's function, solid vertices and ladders define scattering of electrons on disorder.