Shot noise in the presence of spin-flip scattering

Shot noise is a time-dependent current fluctuation due to the discrete character of the electron charge. Here we address shot noise in a spin-resolved tunneling system under the influence of spin-flip scattering within a master equation approach. We find that the average current [I] and Fano factor gamma ("normalized noise") present contrasting behavior for differing spin-flip time ratios: [I] decreases while gamma increases for tau(up arrowdown arrow) > tau(up arrowdown arrow) as compared to the tau(up arrowdown arrow) = tau(up arrowdown arrow) case and vice versa for tau(up arrowdown arrow) < tau(up arrowdown arrow).