Correlation effects in disordered conductors with spin accumulation

TL;DR

This paper investigates how electron-electron interactions and spin accumulation influence the density of states and conductivity in disordered conductors, revealing singularities and negative magnetoconductivity effects.

Contribution

It introduces the impact of spin accumulation on correlation effects, showing singularities in the density of states and negative magnetoconductivity in disordered conductors.

Findings

Interaction correction causes singularities at spin-dependent chemical potential differences.

Spin accumulation leads to negative magnetoconductivity.

Correlation effects vary between metallic and hopping regimes.

Abstract

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.