Role of surface states in STM spectroscopy of (111) metal surfaces with Kondo adsorbates

Abstract

A nearly-free-electron (NFE) model to describe STM spectroscopy of (111) metal surfaces with Kondo impurities is presented. Surface states are found to play an important role giving a larger contribution to the conductance in the case of Cu(111) and Au(111) than Ag(111) surfaces. This difference arises from the farther extension of the Ag(111) surface state into the substrate. The different line shapes observed when Co is adsorbed on different substrates can be explained from the position of the surface band onset relative to the Fermi energy. The lateral dependence of the line shape amplitude is found to be bulk-like for R|| < 4 Amstrongs and surface-like at larger distances, in agreement with experimental data.

arXiv comment4 pages, 3 eps figures

References in corpus (5)

• Theory of the Fano Resonance in the STM Tunneling Density of States due to a Single Kondo Impurity
• Nonequilibrium theory of scanning tunneling spectroscopy via adsorbate resonances: nonmagnetic and Kondo impurities
• Theory of Scanning Tunneling Spectroscopy of a Magnetic Adatom on a Metallic Surface
• Scattering Theory of Kondo Mirages and Observation of Single Kondo Atom Phase Shift
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• Co adatoms on Cu surfaces: ballistic conductance and Kondo temperature
• Quantifying the leading role of the surface state in the Kondo effect of Co/Ag(111)
• A new view on the origin of zero-bias anomalies of Co atoms atop noble metal surfaces
• Theory of differential conductance of Co on Cu(111) including Co s and d orbitals, and surface and bulk Cu states
• Surface states influence in the conductance spectra of Co adsorbed on Cu(111)
• Topological quantum phase transition in individual Fe Atoms on MoS${}_2$/Au(111)
• Scanning tunneling microscopy of adsorbed molecules on metalic surfaces for nearly localized atomic states
• Kondo temperature when the Fermi level is near a step in the conduction density of states
• Surface states and related quantum interference in \textit{ab initio} electron transport
• Towards a microscopic description of dimer adsorbates on metallic surfaces