Memristive properties of single-molecule magnets

Abstract

Single-molecule magnets weakly coupled to two ferromagnetic leads act as memory devices in electronic circuits---their response depends on history, not just on the instantaneous applied voltage. We show that magnetic anisotropy introduces a wide separation of timescales between fast and slow relaxation processes in the system, which leads to a pronounced memory dependence in a wide intermediate time regime. We study the response to a harmonically varying bias voltage from slow to rapid driving within a master-equation approach. The system is not purely memristive but shows a partially capacitive response on short timescales. In the intermediate time regime the molecular spin can be used as the state variable in a two-terminal molecular memory device.

12+ pages, 12 figures

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• Time-Dependent Transport Through Quantum-Impurity Systems with Kondo Resonance
• Electron-vibron coupling effects on electron transport via a single-molecule magnet
• Spin transport and tunable Gilbert damping in a single-molecule magnet junction
• Josephson current through a quantum dot coupled to a molecular magnet
• Unified framework of the microscopic Landau-Lifshitz-Gilbert equation and its application to Skyrmion dynamics
• Intrinsic spin-relaxation induced negative tunnel magnetoresistance in a single-molecule magnet
• Quantum turnstile operation of single-molecule magnets
• Molecular neuron based on the Franck-Condon blockade
• Effect of uniaxial magnetic anisotropy on charge transport in a junction with a precessing anisotropic molecular spin
• Spin transport through a nanojunction with a precessing anisotropic molecular spin: Quantum interference and spin-transfer torque