Spin-Flip Noise in a Multi-Terminal Spin-Valve
W. Belzig, M. Zareyan
TL;DR
This paper investigates shot noise and cross correlations in a four-terminal spin-valve, revealing how magnetic configurations and spin-flip processes influence noise characteristics and correlations.
Contribution
It introduces a Boltzmann-Langevin approach to analyze spin-flip effects on noise and correlations in multi-terminal spin-valves, highlighting the role of magnetic configurations.
Findings
Fano factor varies with magnetic configuration
Spin-flip processes significantly affect cross correlations
Cross correlations are prominent between terminals with opposite magnetization
Abstract
We study shot noise and cross correlations in a four terminal spin-valve geometry using a Boltzmann-Langevin approach. The Fano factor (shot noise to current ratio) depends on the magnetic configuration of the leads and the spin-flip processes in the normal metal. In a four-terminal geometry, spin-flip processes are particular prominent in the cross correlations between terminals with opposite magnetization.
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