Spin Diode Behavior in Transport Through Single-Molecule Magnets

Abstract

We study transport properties of a single-molecule magnet (SMM) weakly coupled to one nonmagnetic and one ferromagnetic lead. Using the diagrammatic technique in real time, we calculate transport in the sequential and cotunneling regimes for both ferromagnetic and antiferromagnetic exchange coupling between the molecule's LUMO level and the core spin. We show that the current flowing through the system is asymmetric with respect to the bias reversal, being strongly suppressed for particular bias polarizations. Thus, the considered system presents a prototype of a SMM spin diode. In addition, we also show that the functionality of such a device can be tuned by changing the position of the molecule's LUMO level and strongly depends on the type of exchange interaction.

6 pages with 4 EPS figures

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Cited by in corpus (11)

• Charge transport through single molecules, quantum dots, and quantum wires
• Interplay of the Kondo Effect and Spin-Polarized Transport in Magnetic Molecules, Adatoms and Quantum Dots
• The Influence of Magnetic Anisotropy on the Kondo Effect and Spin-Polarized Transport through Magnetic Molecules, Adatoms and Quantum Dots
• Memristive properties of single-molecule magnets
• Switching of a Quantum Dot Spin Valve by Single Molecule Magnets
• Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes
• Temperature dependence of electronic transport through molecular magnets in the Kondo regime
• Intrinsic spin-relaxation induced negative tunnel magnetoresistance in a single-molecule magnet
• Tunneling anisotropic magnetoresistance in single-molecule magnet junctions
• Time-dependent spintronic anisotropy in magnetic molecules
• Magnetic-anisotropy induced spin blockade in a single-molecule transistor