Exotic Kondo effect from magnetic trimers

Abstract

Motivated by the recent experiments of Jamneala {\em et al.} [T. Jamnaela {\em et al.}, Phys. Rev. Lett. {\bf 87}, 256804 (2001)], by combining {\em ab-initio} and renormalization group methods, we study the strongly correlated state of a Cr trimer deposited on gold. Internal orbital fluctuations of the trimer lead to huge increase of $T_K$ compared to the single ion Kondo temperature explaining the experimental observation of a zero-bias anomaly for the trimers. The strongly correlated state seems to belong to a new, yet hardly explored class of non--Fermi liquid fixed points.

5 pages, 4 figures

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Cited by in corpus (24)

• Exchange interaction between single magnetic adatoms
• Magnetically Tunable Kondo - Aharonov-Bohm Effect in a Triangular Quantum Dot
• Transition-metal dimers and physical limits on magnetic anisotropy
• Quantum phase transition in quantum dot trimers
• Kondo screening in a magnetically frustrated nanostructure: Exact results on a stable, non-Fermi-liquid phase
• Universal transport signatures in two-electron molecular quantum dots: gate-tunable Hund's rule, underscreened Kondo effect and quantum phase transitions
• First principles calculation of spin-interactions and magnetic ground states of Cr trimers on Au(111)
• Two-channel Kondo phases and frustration-induced transitions in triple quantum dots
• Numerical renormalization group study of two-channel three-impurity triangular clusters
• Kondo effects in a triangular triple quantum dot: NRG study in the whole region of the electron filling
• Local moment formation and Kondo screening in impurity trimers
• Tunneling through triple quantum dots with mirror symmetry
• Kondo regime in triangular arrangements of quantum dots: Molecular orbitals, interference and contact effects
• Kondo effects in a triangular triple quantum dot with lower symmetries
• Conductance through an array of quantum dots
• Strong Correlations in a nutshell
• The effective Kondo model for a trimer on a metallic surface
• Orbital fluctuations and strong correlations in quantum dots
• Frustrated Kondo impurity triangle: A simple model of deconfinement
• Spin current Kondo effect in frustrated Kondo systems
• Scanning tunneling microscopy of adsorbed molecules on metalic surfaces for nearly localized atomic states
• Towards a microscopic description of dimer adsorbates on metallic surfaces
• Non-Fermi liquid, unscreened scalar chirality and parafermions in a frustrated tetrahedron Anderson model
• Two-state behaviour of Kondo trimers