Spin-Flip Noise in a Multi-Terminal Spin-Valve

摘要

We study shot noise and cross correlations in a four terminal spin-valvegeometry using a Boltzmann-Langevin approach. The Fano factor (shot noise tocurrent ratio) depends on the magnetic configuration of the leads and thespin-flip processes in the normal metal. In a four-terminal geometry, spin-flipprocesses are particular prominent in the cross correlations between terminalswith opposite magnetization.