Spin-charge separation and simultaneous spin and charge Kondo effect

Abstract

We study the spin-charge separation in a Kondo-like model for an impurity with a spin and a charge (isospin) degree of freedom coupled to a single conduction channel (the ``spin-charge'' Kondo model). We show that the spin and charge Kondo effects can occur simultaneously at any coupling strength. In the continuum (wide-band or weak coupling) limit, the Kondo screening in each sector is independent, while at finite bandwidth and strong coupling the lattice effects lead to a renormalization of the effective Kondo exchange constants; nevertheless, universal spin and charge Kondo effects still occur. We find similar behavior in the two-impurity Anderson model with positive and negative electron-electron interaction and in the two-impurity Anderson-Holstein model with a single phonon mode. We comment on the applicability of such models to describe the conductance of deformable molecules with a local magnetic moment.

13 pages, 11 figures

References in corpus (35)

• Kondo Physics in a Single Electron Transistor
• One-Dimensional Fermi liquids
• Transport Coefficients of the Anderson Model via the Numerical Renormalization Group
• Spin-charge separation and localization in one-dimension
• The Kondo effect in C${}_{60}$ single-molecule transistors
• Inelastic electron tunneling via molecular vibrations in single-molecule transistors
• Finite temperature numerical renormalization group study of the Mott-transition
• Conformal Field Theory Approach to the 2-Impurity Kondo Problem: Comparison with Numerical Renormalization Group Results
• Generalized Numerical Renormalization Group for Dynamical Quantities
• Many Body Effects on the Transport Properties of Single-Molecule Devices
• Anderson impurity in pseudo-gap Fermi systems
• Numerical Renormalization Group Study of the Anderson-Holstein Impurity Model
• Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors
• Pedestrian Approach to the Two-Channel Kondo Model
• Multi-impurity Anderson model for quantum dots coupled in parallel
• Gap formation and soft phonon mode in the Holstein model
• Pair tunneling through single molecules
• Magnetotransport through a strongly interacting quantum dot
• Quantum transport through a deformable molecular transistor
• Systematic numerical study of spin-charge separation in one dimension
• Simple Bosonization Solution of the 2-channel Kondo Model: I. Analytical Calculation of Finite-Size Crossover Spectrum
• Finite-Size Bosonization of 2-Channel Kondo Model: a Bridge between Numerical Renormalization Group and Conformal Field Theory
• Numerical renormalization group study of the symmetric Anderson-Holstein model: phonon and electron spectral functions
• Spin-charge separation and Kondo effect in an open quantum dot
• Magnetoconductance through a vibrating molecule in the Kondo regime
• Simple description of the anisotropic two-channel Kondo problem
• Conductance of deformable molecules with interaction
• Electron Transport through a Molecular Conductor with Center-of-Mass Motion
• Transport Coefficients of the Anderson Model
• Low energy fixed points of the sigma-tau and the O(3) symmetric Anderson models
• Slave-boson approach to the infinite-U Anderson-Holstein impurity model
• Spectral Densities of Response Functions for the O(3) Symmetric Anderson and Two Channel Kondo Models
• A new non-Fermi liquid fixed point
• A path integral approach to Anderson-Holstein model
• On two channel flavor anisotropic and one channel compactified Kondo models

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• Spin selective transport through Aharonov-Bohm and Aharonov-Casher triple quantum dot systems
• Scanning tunneling microscopy of adsorbed molecules on metalic surfaces for nearly localized atomic states
• Local phonon mode in a fermionic bath, and its relation to Kondo effect
• Kondo effect in transport through Aharonov-Bohm and Aharonov-Casher interferometers
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• Quantum phase transitions in superconductor--quantum-dot--superconductor Josephson structures with attractive intradot interaction