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Open Access Nano Express

Noise and fluctuation relations of a spin diode

Jong Soo Lim1, Rosa López12 and David Sánchez12

Author Affiliations

1 Instituto de Física Interdisciplinar y Sistemas Complejos IFISC (UIB-CSIC), Palma de Mallorca E-07122, Spain

2 Departament de Física, Universitat de les Illes Balears, Palma de Mallorca E-07122, Spain

Nanoscale Research Letters 2013, 8:246  doi:10.1186/1556-276X-8-246

Published: 20 May 2013

Abstract

We consider fluctuation relations between the transport coefficients of a spintronic system where magnetic interactions play a crucial role. We investigate a prototypical spintronic device - a spin-diode - which consists of an interacting resonant level coupled to two ferromagnetic electrodes. We thereby obtain the cumulant generating function for the spin transport in the sequential tunnelling regime. We demonstrate the fulfilment of the nonlinear fluctuation relations when up and down spin currents are correlated in the presence of both spin-flip processes and external magnetic fields.

Keywords:
Spin noise; Spin diode; Fluctuation relations