Quantum-Tunneling-Induced Kondo Effect in Single Molecular Magnets

2005/11/30 by C. Romeike, M. R. Wegewijs, Walter Hofstetter +3 · 7 citations
Engineering · Materials Science · Physics and Astronomy · #Condensed matter physics #Electron #Kondo effect #Magnet #Magnetic field #Magnetism in coordination complexes #Magnetization #Molecular Junctions and Nanostructures #Molecular magnets #Physics #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #cond-mat.dis-nn #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.96.196601

published as Phys. Rev. Lett., 96, 196601 (2006) · 4 pages, 4 figures

openalex publication_date 2006/05/01 · arxiv created 2006/05/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We consider transport through a single-molecule magnet strongly coupled to metallic electrodes. We demonstrate that, for a half-integer spin of the molecule, electron and spin tunneling cooperate to produce both quantum tunneling of the magnetic moment and a Kondo effect in the linear conductance. The Kondo temperature depends sensitively on the ratio of the transverse and easy-axis anisotropies in a nonmonotonic way. The magnetic symmetry of the transverse anisotropy imposes a selection rule on the total spin for the occurrence of the Kondo effect which deviates from the usual even-odd alternation.

Citations

• Driving Current through Single Organic Molecules
• Effect of extra electrons on the exchange and magnetic anisotropy in the anionic single-molecule magnetMn12
• Relation between the Anderson and Kondo Hamiltonians
• The renormalization group: Critical phenomena and the Kondo problem

Cited by

• Nonequilibrium Dynamics of Anisotropic Large Spins in the Kondo Regime: Time-Dependent Numerical Renormalization Group Analysis
• Real-time renormalization group and cutoff scales in nonequilibrium applied to an arbitrary quantum dot in the Coulomb blockade regime
• The emergence of classical behaviour in magnetic adatoms
• Spin transport and tunable Gilbert damping in a single-molecule magnet junction
• Slave boson theory for transport through magnetic molecules with vibronic states
• Spin-dependent thermoelectric effects in transport through a nanoscopic junction involving a spin impurity
• Crossover from Kondo-Assisted Suppression to Co-Tunneling Enhancement of Tunneling Magnetoresistance via Ferromagnetic Nanodots in MgO Tunnel Barriers