Analysis of the Kondo effect in ferromagnetic atomic-sized contacts

Abstract

Atomic contacts made of ferromagnetic metals present zero-bias anomalies in the differential conductance due to the Kondo effect. These systems provide a unique opportunity to perform a statistical analysis of the Kondo parameters in nanostructures since a large number of contacts can be easily fabricated using break-junction techniques. The details of the atomic structure differ from one contact to another so a large number of different configurations can be statistically analyzed. Here we present such a statistical analysis of the Kondo effect in atomic contacts made from the ferromagnetic transition metals Ni, Co and Fe. Our analysis shows clear differences between materials that can be understood by fundamental theoretical considerations. This combination of experiments and theory allow us to extract information about the origin and nature of the Kondo effect in these systems and to explore the influence of geometry and valence in the Kondo screening of atomic-sized nanostructures.

17 pages, 11 figures

References in corpus (46)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• Quantum properties of atomic-sized conductors
• Kondo physics in carbon nanotubes
• Fano Resonances in Electronic Transport through a Single Electron Transistor
• The role of magnetic anisotropy in the Kondo effect
• The Kondo effect in C${}_{60}$ single-molecule transistors
• Kondo effect in quantum dots coupled to ferromagnetic leads
• Kondo effect in a magnetic field and the magnetoresistivity of Kondo alloys
• Electric-field controlled spin reversal in a quantum dot with ferromagnetic contacts
• Kondo effect in a quantum dot coupled to ferromagnetic leads: A numerical renormalization group analysis
• Magnetic impurity formation in quantum point contacts
• Observation of the Fano-Kondo Anti-Resonance in a Quantum Wire with a Side-Coupled Quantum Dot
• The Kondo effect in ferromagnetic atomic contacts
• Measurements of Kondo and spin splitting in single-electron transistors
• Kondo temperature of magnetic impurities at surfaces
• Absence of magnetically-induced fractional quantization in atomic contacts
• Conductance fluctuations as a tool for investigating the quantum modes in atomic size metallic contacts
• A Tunable Two-impurity Kondo system in an atomic point contact
• Fano resonance in crossed carbon nanotubes
• Theoretical analysis of the conductance histograms and structural properties of Ag, Pt and Ni nanocontacts
• Kondo resonance narrowing in d- and f-electron systems
• Fano-Kondo effect in side-coupled double quantum dots at finite temperatures and the importance of the two-stage Kondo screening
• Formation of a Metallic Contact: Jump to Contact Revisited
• Controlling the Kondo Effect in CoCu_n Clusters Atom by Atom
• Regular and Singular Fermi Liquid fixed points in quantum impurity models
• Singular Dynamics of Underscreened Magnetic Impurity Models
• Dynamical Mean-Field Theory for Molecular Electronics: Electronic Structure and Transport Properties
• Magnetic and orbital blocking in Ni nanocontacts
• Kondo effect in single atom contacts: the importance of the atomic geometry
• Hopf algebras and the logarithm of the S-transform in free probability
• Kondo Conductance in an Atomic Nanocontact from First Principles
• Non Fermi Liquid behavior in the under-screened Kondo model
• Correlated electron physics in multilevel quantum dots: phase transitions, transport, and experiment
• Kondo effect and conductance of nanocontacts with magnetic impurities
• Singular conductance of a spin 1 quantum dot
• Tunable Kondo effect in double quantum dots coupled to ferromagnetic contacts
• Theoretical study of the conductance of ferromagnetic atomic-sized contacts
• Mechanical annealing of metallic electrodes at the atomic scale
• Ballistic Conductance and Magnetism in Short Tip-Suspended Ni Nanowires
• Quantized Conductance of a Single Magnetic Atom
• Kondo effect of a Co atom on Cu(111) in contact with an Fe tip
• Conductance of a spin-1 quantum dot: the two-stage Kondo effect
• Conduction eigenchannels of atomic-sized contacts: Ab initio KKR Green's function formalism
• Mechanical, Electrical, and Magnetic Properties of Ni Nanocontacts
• Quantum replica approach to the under-screened Kondo model

Cited by in corpus (4)

• The nature of the electrical conduction in ferromagnetic atomic-size contacts: insights from shot noise measurements and theoretical simulations
• Non-equilibrium spin-current detection with a single Kondo impurity
• Surface states influence in the conductance spectra of Co adsorbed on Cu(111)
• Electronic Transport in Gadolinium Atomic-Size Contacts