Two-stage three-channel Kondo physics for an FePc molecule on the Au(111) surface
arXiv:1806.00402 · doi:10.1088/1361-648X/aad973
Abstract
We study an impurity Anderson model to describe an iron phthalocyanine (FePc) molecule on Au(111), motivated by previous results of scanning tunneling spectroscopy (STS) and theoretical studies. The model hybridizes a spin doublet consisting in one hole at the orbital of iron and two degenerate doublets corresponding to one hole either in the or in the orbital (called orbitals) with two degenerate Hund-rule triplets with one hole in the orbital and another one in a orbital. We solve the model using a slave-boson mean-field approximation (SBMFA). For reasonable parameters we can describe very well the observed STS spectrum between sample bias -60 mV to 20 mV. For these parameters the Kondo stage takes place in two stages, with different energy scales corresponding to the Kondo temperatures related with the hopping of the and orbitals respectively. There is a strong interference between the different channels and the Kondo temperatures, particularly the lowest one is strongly reduced compared with the value in the absence of the competing channel.
References in corpus (45)
- Kondo Physics in a Single Electron Transistor
- A Tunable Kondo Effect in Quantum Dots
- From the Kondo Regime to the Mixed-Valence Regime in a Single-Electron Transistor
- The Kondo Effect in the Unitary Limit
- Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
- Orbital Kondo effect in carbon nanotubes
- Manipulating Kondo Temperature via Single Molecule Switching
- SU(4) Fermi Liquid State and Spin Filtering in a Double Quantum Dot System
- Tuning the Kondo effect with a mechanically controllable break junction
- SU(4) Kondo Effect in Carbon Nanotubes
- Universal Scaling in Non-equilibrium Transport Through a Single-Channel Kondo Dot
- Observation of the SU(4) Kondo state in a double quantum dot
- DMFT+NRG study of spin-orbital separation in a three-band Hund's metal
- Tuning the magnetic anisotropy of single molecules
- Spin-1/2 Kondo effect in an InAs nanowire quantum dot: the Unitary limit, conductance scaling and Zeeman splitting
- Spin-Flavor Separation and Non-Fermi Liquid Behavior in the Multichannel Kondo Problem: A Large N Approach
- Kondo Effects in Carbon Nanotubes: From SU(4) to SU(2) symmetry
- Transition from overscreening to underscreening in the multichannel Kondo model: exact solution at large N
- Zero-bias conductance in carbon nanotube quantum dots
- Universal transport signatures in two-electron molecular quantum dots: gate-tunable Hund's rule, underscreened Kondo effect and quantum phase transitions
- Pseudospin-Resolved Transport Spectroscopy of the Kondo Effect in a Double Quantum Dot
- Magnetic Field Probing of an SU(4) Kondo Resonance in a Single Atom Transistor
- Mirages and many-body effects in quantum corrals
- Transport through a quantum dot with SU(4) Kondo entanglement
- Spin polarized current and shot noise in carbon nanotube quantum dot in the Kondo regime
- Conductance through an array of quantum dots
- Thermopower of an SU(4) Kondo resonance under an SU(2) symmetry-breaking field
- Magnetic-Field Dependence of Tunnel Couplings in Carbon Nanotube Quantum Dots
- Quantum Transport Through a Stretched Spin--1 Molecule
- Interplay between quantum interference and Kondo effects in nonequilibrium transport through nanoscopic systems
- Transport in Carbon Nanotubes: 2LSU(2) regime reveals subtle competition between Kondo and Intermediate Valence states
- Orbital Kondo spectroscopy in a double quantum dot system
- Transition between SU(4) and SU(2) Kondo effect
- Full electrostatic control over polarized currents through spin-orbital Kondo effect
- The Kondo Temperature of SU(4) Symmetric Quantum Dots
- Quantifying the leading role of the surface state in the Kondo effect of Co/Ag(111)
- Analysis of low energy response and possible emergent SU(4) Kondo state in a double quantum dot
- Spectral evolution of the SU(4) Kondo effect from the single impurity to the two-dimensional lattice
- Non-Fermi liquid behavior in transport through Co doped Au chains
- Orbital fluctuations and strong correlations in quantum dots
- Field-Enhanced Kondo Correlations in a Half-Filling Nanotube Dot: Evolution of an SU(N) Fermi-Liquid Fixed Point
- Effect of covalency and interactions on the trigonal splitting in NaxCoO2
- Valence fluctuations in a lattice of magnetic molecules: application to iron(II) phtalocyanine molecules on Au(111)
- Kondo behavior and conductance through impurities in gold chains doped with oxygen
- Magnetic and orbital instabilities in a lattice of SU(4) organometallic Kondo complexes