Spin-dependent heat signatures of single-molecule spin dynamics

Abstract

We investigate transient spin-dependent thermoelectric signatures in a single-molecule magnet under the effect of a time-dependent voltage pulse. We model the system using nonequilibrium Green's functions and a generalized spin equation of motion incorporating the dynamic electronic structure of the molecule. We show that the generated heat current in the system is due to both charge and spin contributions, related to the Peltier and the spin-dependent Peltier effect. There is also a clear signature in the heat current due to the spin dynamics of the single-molecule and a possibility to control the spin-dependent heat currents by bias, tunneling coupling and exchange interaction. A reversal of the net heat transfer in the molecule is found for increasing bias voltage due to the local Zeeman split and we can correlate the net heat transfer with the local anisotropies and dynamic exchange fields in the system.

arXiv comment9 pages, 6 figures

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Cited by in corpus (8)

• A many-body approach to transport in quantum systems: From the transient regime to the stationary state
• Spin Seebeck effect of correlated magnetic molecules
• Dynamics of spin relaxation in nonequilibrium magnetic nanojunctions
• Thermosize voltage induced in a ballistic graphene nanoribbon junction
• 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
• Aharonov Bohm Effect in Voltage Dependent Molecular Spin Dimer Switch
• Quantum Shape Effects