Sequential Tunneling through Molecular Spin Rings

Abstract

We consider electrical transport through molecules with Heisenberg-coupled spins arranged in a ring structure in the presence of an easy-axis anisotropy. The molecules are coupled to two metallic leads and a gate. In the charged state of the ring, a Zener double-exchange mechanism links transport properties to the underlying spin structure. This leads to a remarkable contact-site dependence of the current, which for an antiferromagnetic coupling of the spins can lead to a total suppression of the zero-bias conductance when the molecule is contacted at adjacent sites.

4 pages, 3 figures

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Cited by in corpus (15)

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• Spin-bias driven magnetization reversal and nondestructive detection in a single molecular magnet
• Nonequilibrium Dynamics of Anisotropic Large Spins in the Kondo Regime: Time-Dependent Numerical Renormalization Group Analysis
• Memristive properties of single-molecule magnets
• Theory of Tunneling Spectroscopy in a Mn${}_{12}$ Single-Electron Transistor by Density-Functional Theory Methods
• Quantum transport through single-molecule junctions with orbital degeneracies
• Dzyaloshinskii-Moriya interaction in transport through single molecule transistors
• Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes
• Intrinsic spin-relaxation induced negative tunnel magnetoresistance in a single-molecule magnet
• Gapless Spin Excitations in the $S=1/2$ Kagome- and Triangular-Lattice Heisenberg Antiferromagnets
• The single-electron transport in a three-ion magnetic molecule modulated by a transverse field