Iron impurities in gold and silver: Comparison of transport measurements to numerical renormalization group calculations exploiting non-Abelian symmetries

Abstract

We consider iron impurities in the noble metals gold and silver and compare experimental data for the resistivity and decoherence rate to numerical renormalization group results. By exploiting non-Abelian symmetries we show improved numerical data for both quantities as compared to previous calculations [Costi et al., Phys. Rev. Lett. 102, 056802 (2009)], using the discarded weight as criterion to reliably judge the quality of convergence of the numerical data. In addition we also carry out finite-temperature calculations for the magnetoresistivity of fully screened Kondo models with S = 1/2, 1 and 3/2, and compare the results with available measurements for iron in silver, finding excellent agreement between theory and experiment for the spin-3/2 three-channel Kondo model. This lends additional support to the conclusion of Costi et al. that the latter model provides a good effective description of the Kondo physics of iron impurities in gold and silver.

11 pages, 6 figures, published version

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• Interleaved numerical renormalization group as an efficient multiband impurity solver
• Generalization of the Time-Dependent Numerical Renormalization Group Method to Finite Temperatures and General Pulses
• Time-Dependent Numerical Renormalization Group Method for Multiple Quenches: Application to General Pulses and Periodic Driving
• Quasiparticle interference from magnetic impurities
• Local susceptibility and Kondo scaling in the presence of finite bandwidth
• Multiple magnetic impurities on surfaces: Scattering and quasiparticle interference
• QSpace - An open-source tensor library for Abelian and non-Abelian symmetries
• Unidirectional Kondo scattering in layered NbS2
• Equilibrium Quantum Impurity Problems via Matrix Product State Encoding of the Retarded Action
• Equilibrium Fermi-liquid coefficients for the fully screened N-channel Kondo model
• Validity of the local self-energy approximation: Application to coupled quantum impurities
• Electronic excitation spectra of the five-orbital Anderson impurity model: From the atomic limit to itinerant atomic magnetism
• Transport properties of fully screened Kondo models
• Magnetization curves of deposited finite spin chains
• Computing local multipoint correlators using the numerical renormalization group