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Externally controlled selective spin transfer through a two-terminal bridge setup

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Abstract

A new way of getting controlled spin dependent transport through a two-terminal bridge setup is explored. The system comprises a magnetic quantum ring which is directly coupled to a magnetic quantum wire and subjected to an in-plane electric field perpendicular to the wire. Without directly changing system parameters, one can regulate spin currents simply by tuning the external electric field under a finite bias drop across the wire. For some particular field strengths a high degree of spin polarization can be achieved and thus the system can essentially be utilized as an externally controlled spin polarized device. A detailed comparison of spin current magnitudes obtained from other bridge setups is also examined to make the present investigation a self contained study.

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Authors and Affiliations

  1. Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 Barrackpore Trunk Road, 700108, Kolkata, India

    Santanu K. Maiti

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Maiti, S. Externally controlled selective spin transfer through a two-terminal bridge setup. Eur. Phys. J. B 88, 172 (2015). https://doi.org/10.1140/epjb/e2015-60067-8

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