Spin-filtering effect in the transport through a single-molecule magnet Mn${}_{12}$ bridged between metallic electrodes

Abstract

Electronic transport through a single-molecule magnet Mn${}_{12}$ in a two-terminal set up is calculated using the non-equilibrium Green's function method in conjunction with density-functional theory. A single-molecule magnet Mn${}_{12}$ is bridged between Au(111) electrodes via thiol group and alkane chains such that its magnetic easy axis is normal to the transport direction. A computed spin-polarized transmission coefficient in zero-bias reveals that resonant tunneling near the Fermi level occurs through some molecular orbitals of majority spin only. Thus, for low bias voltages, a spin-filtering effect such as only one spin component contributing to the conductance, is expected. This effect would persist even with inclusion of additional electron correlations.

Accepted for publication at J. Appl. Phys

References in corpus (4)

• Signatures of Molecular Magnetism in Single-Molecule Transport Spectroscopy
• Transport through anisotropic magnetic molecules with partially ferromagnetic leads: Spin-charge conversion and negative differential conductance
• Fabrication of Nano-Gapped Single-Electron Transistors for Transport Studies of Individual Single-Molecule Magnets
• First-principles study of a single-molecule magnet Mn_{12} monolayer on the Au(111) surface

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