Shot noise suppression due to a magnetic field in disordered conductors

We investigate the effect of an orthogonal magnetic field on a 2-D disordered wire, by means of a numerical model based on the recursive Green’s function technique. We discuss the resulting behavior of the shot noise suppression factor and of the conductance in terms of the interplay among the relevant transport quantities, i.e. the mean free path, the localization length, the average separation between impurities and the cyclotron radius. We find that, starting from a diffusive or quasi-diffusive behavior, shot noise is increasingly suppressed as the magnetic field is turned on, up to a noiseless condition typical of the disappearance of backscattering for edge states.