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arXiv · 1205.3881

Strong Spin-Filtering and Spin-Valve Effects in a Molecular V-C60-V Contact

Mohammad Koleini·Mads Brandbyge
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Abstract

Motivated by the recent achievements in manipulation of C60 molecules in STM experiments, we study theoretically the structure and electronic properties of a C60 molecule in an STM-tunneljunction with a magnetic tip and magnetic adatom on a Cu(111) surface from first-principle calculations. For the case of V tip/adatom, we demonstrate how spin-coupling between the magnetic V atoms mediated by the C60 can be observed in the electronic transport, which display a strong spin-filtering effect, allowing mainly majority-spin electrons to pass(>95%). Moreover, we find a significant change in the conductance between parallel and anti-parallel spin polarizations in the junction (86%) which suggests that STM experiments should be able to characterize the magnetism and spin-coupling for these systems.

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Mohammad Koleini, Mads Brandbyge. 2012-05-17. Strong Spin-Filtering and Spin-Valve Effects in a Molecular V-C60-V Contact. https://doi.org/10.3762/bjnano.3.69

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