Current noise generated by spin imbalance in presence of spin relaxation

Abstract

We calculate current (shot) noise in a metallic diffusive conductor generated by spin imbalance in the absence of a net electric current. This situation is modeled in an idealized three-terminal setup with two biased ferromagnetic leads (F-leads) and one normal lead (N-lead). Parallel magnetization of the F-leads gives rise in spin-imbalance and finite shot noise at the N-lead. Finite spin relaxation results in an increase of the shot noise, which depends on the ratio of the length of the conductor ($L$) and the spin relaxation length ($l_s$). For $L\gg l_s$ the shot noise increases by a factor of two and coincides with the case of the anti-parallel magnetization of the F-leads.

References in corpus (9)

• Spintronics: Fundamentals and applications
• Shot Noise in Mesoscopic Conductors
• Electrical Detection of Spin Transport in Lateral Ferromagnet-Semiconductor Devices
• All-electric all-semiconductor spin field effect transistors
• Noise in Multiterminal Diffusive Conductors: Universality, Nonlocality and Exchange Effects
• Local noise in a diffusive conductor
• Shot Noise Induced by Nonequilibrium Spin Accumulation
• Measuring Spin Accumulations with Current Noise
• Non-universal shot noise in quasiequilibrium spin valves

Cited by in corpus (4)

• Spatial and energy resolution of electronic states by shot noise
• Heat-mode excitation in a proximity superconductor
• Noise insights into electronic transport
• Diagnostics of many-particle electronic states from non-stationary currents and residual charge