Many-body theory of the neutralization of strontium ions on gold surfaces

Abstract

Motivated by experimental evidence for mixed-valence correlations affecting the neutralization of strontium ions on gold surfaces we set up an Anderson-Newns model for the Sr:Au system and calculate the neutralization probability $\alpha$ as a function of temperature. We employ quantum-kinetic equations for the projectile Green functions in the finite$-U$ non-crossing approximation. Our results for $\alpha$ agree reasonably well with the experimental data as far as the overall order of magnitude is concerned showing in particular the correlation-induced enhancement of $\alpha$. The experimentally found non-monotonous temperature dependence, however, could not be reproduced. Instead of an initially increasing and then decreasing $\alpha$ we find over the whole temperature range only a weak negative temperature dependence. It arises however clearly from a mixed-valence resonance in the projectile's spectral density and thus supports qualitatively the interpretation of the experimental data in terms of a mixed-valence scenario.

arXiv commentrevised accepted version of the original submission

References in corpus (19)

• 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 Anderson Model out of Equilibrium: Non-Crossing-Approximation Approach to Transport through a Quantum Dot
• Kondo effect in quantum dots
• Memory Effects In Nonequilibrium Quantum Impurity Models
• Many Body Theory of Charge Transfer in Hyperthermal Atomic Scattering
• Kondo effect in coupled quantum dots: a Non-crossing approximation study
• Auger neutralization and ionization processes for charge exchange between slow noble gas atoms and solid surfaces
• Spatial and temporal propagation of Kondo correlations
• Anderson impurity model in nonequilibrium: analytical results versus quantum Monte Carlo data
• Memory Loss and Auger Processes in a Many Body Theory of Charge Transfer
• Conserving Diagrammatic Approximations for Quantum Impurity Models: NCA and CTMA
• Time-Dependent Numerical Renormalization Group Method for Multiple Quenches: Application to General Pulses and Periodic Driving
• Room Temperature Kondo effect in atom-surface scattering: dynamical 1/N approach
• Extension of the Non-Crossing Approximation for the Anderson Model with Finite Coulomb Repulsion
• Thermally Enhanced Neutralization in Hyperthermal Energy Ion Scattering
• Auger de-excitation of metastable molecules at metallic surfaces
• Pseudo-particle approach for charge-transferring molecule-surface collisions

Cited by in corpus (12)

• Towards an integrated modeling of the plasma-solid interface
• Stopping dynamics of ions passing through correlated honeycomb clusters
• Time evolution of the Kondo resonance in response to a quench
• Ion Impact Induced Ultrafast Electron Dynamics in Correlated Materials and Finite Graphene Clusters
• Ion-induced secondary electron emission from metal surfaces
• Time-dependent numerical renormalization group method for multiple quenches: towards exact results for the long time limit of thermodynamic observables and spectral functions
• Electron kinetics at the plasma interface
• Extending \textit{ab initio} plasma-surface simulations to experimentally relevant scales
• Neutralization dynamics of slow highly charged ions passing through graphene nanoflakes--an embedding self-energy approach
• Time-dependent spectral functions of the Anderson impurity model in response to a quench with application to time-resolved photoemission spectroscopy
• Doublon production in correlated materials by multiple ion impacts
• Microscopic modeling of gas-surface scattering. I. A combined molecular dynamics-rate equation approach