Kondo-transport spectroscopy of single molecule magnets

Abstract

We demonstrate that in a single molecule magnet (SMM) strongly coupled to electrodes the Kondo effect involves all magnetic excitations. This Kondo effect is induced by the quantum tunneling of the magnetic moment (QTM). Importantly, the Kondo temperature $T_K$ can be much larger than the magnetic splittings. We find a strong modulation of the Kondo effect as function of the transverse anisotropy parameter or a longitudinal magnetic field. For both integer and half-integer spin this can be used for an accurate transport spectroscopy of the magnetic states in low magnetic fields on the order of the easy-axis anisotropy parameter. We set up a relationship between the Kondo effects for successive integer and half-integer spins.

arXiv comment5 pages, 3 figures

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• Crossover from Kondo assisted suppression to co-tunneling enhancement of tunneling magnetoresistance via ferromagnetic nanodots in MgO tunnel barriers
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• Interplay of the Kondo Effect and Spin-Polarized Transport in Magnetic Molecules, Adatoms and Quantum Dots
• Efficient simulation of open quantum systems coupled to a fermionic bath
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• Nonequilibrium Dynamics of Anisotropic Large Spins in the Kondo Regime: Time-Dependent Numerical Renormalization Group Analysis
• Nonequilibrium Spin Dynamics in the Ferromagnetic Kondo Model
• Padé approximants for improved finite-temperature spectral functions in the numerical renormalization group
• Josephson Effect through an isotropic magnetic molecule
• Resonant and Kondo tunneling through molecular magnets
• The Influence of Magnetic Anisotropy on the Kondo Effect and Spin-Polarized Transport through Magnetic Molecules, Adatoms and Quantum Dots
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• Numerical Renormalization Group calculations of the magnetization of isotropic and anisotropic Kondo impurities
• Competition between quantum spin tunneling and Kondo effect
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• Shot noise spectrum of artificial Single Molecule Magnets: measuring spin-relaxation times via the Dicke effect
• Vibrational detection and control of spin in mixed-valence molecular transistors
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• Temperature dependence of electronic transport through molecular magnets in the Kondo regime
• Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes
• Transverse anisotropy effects on spin-resolved transport through large-spin molecules
• Correlation effects in the electronic structure of Mn${}_4$ molecular magnet
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• Intrinsic spin-relaxation induced negative tunnel magnetoresistance in a single-molecule magnet
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• Spectral Density Modulation and Universal Markovian Closure of Fermionic Environments
• Anisotropic Kondo screening induced by spin-orbit coupling in quantum wires
• Tunneling anisotropic magnetoresistance in single-molecule magnet junctions
• An ab initio perspective on scanning tunneling microscopy measurements of the tunable Kondo resonance of the TbPc${}_2$ molecule on a gold substrate
• Magnetization curves of deposited finite spin chains
• Magnetic field modulated Kondo effect in a single-magnetic-ion molecule
• Negative differential conductance and super-Poissonian shot noise in single-molecule magnet junctions