Enhanced Spin Dependent Shot Noise in Magnetic Tunnel Barriers

Details Enhanced Spin Dependent Shot Noise in Magnetic Tunnel Barriers Enhanced Spin Dependent Shot Noise in Magnetic Tunnel Barriers

2007-01-18

arxiv.org/abs/cond-mat/0701458v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 8 figures, submitted to Physica E (proceedings of the seminar on Quantum Coherence, Noise and Decoherence in Nanostru

Scientific paper

10.1016/j.physe.2007.05.005

We report the observation of enhanced spin dependent shot noise in magnetic tunnel barriers, suggesting transport through localized states within the barrier. This is supported by the existence of negative magnetoresistance and structure in the differential conductance curves. A simple model of tunneling through two interacting localized states with spin dependent tunneling rates is used to explain our observations.

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