Magnetic quantum coherence effect in Ni-4 molecular transistors

    Authors

    G. Gonzalez;M. N. Leuenberger

    Comments

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    Abbreviated Journal Title

    J. Phys.-Condes. Matter

    Keywords

    single molecule magnets; magnetic quantum tunneling; Landauer formula; INTERFERENCE; PARTICLES; SUPPRESSION; STATES; Physics, Condensed Matter

    Abstract

    We present a theoretical study of electron transport in Ni-4 molecular transistors in the presence of Zeeman spin splitting and magnetic quantum coherence (MQC). The Zeeman interaction is extended along the leads which produces gaps in the energy spectrum which allow electron transport with spin polarized along a certain direction. We show that the coherent states in resonance with the spin up or down states in the leads induces an effective coupling between localized spin states and continuum spin states in the single molecule magnet and leads, respectively. We investigate the conductance at zero temperature as a function of the applied bias and magnetic field by means of the Landauer formula, and show that the MQC is responsible for the appearence of resonances. Accordingly, we name them MQC resonances.

    Journal Title

    Journal of Physics-Condensed Matter

    Volume

    26

    Issue/Number

    27

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    5

    WOS Identifier

    WOS:000338702600018

    ISSN

    0953-8984

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