Simple model for scanning tunneling spectroscopy of noble metal surfaces with adsorbed Kondo impurities
arXiv:cond-mat/0308103 · doi:10.1103/PhysRevB.69.115404
Abstract
A simple model is introduced to describe conductance measurements between a scanning tunneling microscope (STM) tip and a noble metal surface with adsorbed transition metal atoms which display the Kondo effect. The model assumes a realistic parameterization of the potential created by the surface and a d3z2-r2 orbital for the description of the adsorbate. Fano lineshapes associated with the Kondo resonance are found to be sensitive to details of the adsorbate-substrate interaction. For instance, bringing the adsorbate closer to the surface leads to more asymmetric lineshapes while their dependence on the tip distance is weak. We find that it is important to use a realistic surface potential, to properly include the tunnelling matrix elements to the tip and to use substrate states which are orthogonal to the adsorbate and tip states. An application of our model to Co adsorbed on Cu explains the difference in the lineshapes observed between Cu(100) and Cu(111) surfaces.
arXiv comment11 pages, 8 eps figures
References in corpus (4)
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Cited by in corpus (18)
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- Mirages and many-body effects in quantum corrals
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- Orbital signatures of Fano-Kondo line shapes in STM adatom spectroscopy
- Nonequilibrium dynamics of a singlet-triplet Anderson impurity near the quantum phase transition
- Role of surface states in STM spectroscopy of (111) metal surfaces with Kondo adsorbates
- The effective Kondo model for a trimer on a metallic surface
- Co adatoms on Cu surfaces: ballistic conductance and Kondo temperature
- Kondo effect in binuclear metal-organic complexes with weakly interacting spins
- Surface states influence in the conductance spectra of Co adsorbed on Cu(111)
- Scanning tunneling microscopy of adsorbed molecules on metalic surfaces for nearly localized atomic states
- Electrical control of spin dynamics in finite one-dimensional systems
- Towards a microscopic description of dimer adsorbates on metallic surfaces
- A Non-equilibrium STM model for Kondo Resonance on surface