Manipulating magnetism and conductance of an adatom-molecule junction on a metal surface: An ab initio study

Kun Tao, V.S. Stepanyuk, P. Bruno, D.I. Bazhanov, V.V. Maslyuk, Mads Brandbyge, I. Mertig

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    Abstract

    The state of the art ab initio calculations reveal the effect of a scanning tunneling microscopy tip on magnetic properties and conductance of a benzene-adatom sandwich on Cu(001). We concentrate on a benzene-Co system interacting with a Cr tip. Our studies give a clear evidence that magnetism and conductance in molecule-adatom junctions can be tailored by the STM tip. Varying the tip-substrate distance the magnetic moment of the Co adatom can be switched on/off. The interplay between spin-polarized electron transport through the junction and its magnetic properties is demonstrated. A spin-filter effect in the junction is predicted.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume78
    Issue number1
    Pages (from-to)014426
    ISSN0163-1829
    DOIs
    Publication statusPublished - 2008

    Bibliographical note

    Copyright 2008 American Physical Society

    Keywords

    • ATOMIC-SCALE
    • SPECTROSCOPY
    • AUGMENTED-WAVE METHOD
    • BENZENE
    • SINGLE-MOLECULE
    • ANISOTROPY
    • SCANNING TUNNELING MICROSCOPE

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