Nonequilibrium transport through a Kondo dot: Decoherence effects

2004/01/12 by J. Paaske, Jens Paaske, Achim Rosch +4 · 86 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Condensed matter physics #Conduction electron #Electron #Kondo effect #Kondo insulator #Logarithm #Non-equilibrium thermodynamics #Physics #Quantum #Quantum and electron transport phenomena #Quantum decoherence #Quantum dot #Quantum electrodynamics #Quantum mechanics #Relaxation (psychology) #Semiconductor Quantum Structures and Devices #Thermal conduction #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.70.155301

published in Physical Review B 70(15) (American Physical Society) · 16 pages, 4 figures

arxiv created 2004/01/12 · openalex publication_date 2004/10/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate the effects of voltage induced spin-relaxation in a quantum dot in the Kondo regime. Using nonequilibrium perturbation theory, we determine the joint effect of self-energy and vertex corrections to the conduction electron T-matrix in the limit of transport voltage much larger than temperature. The logarithmic divergences, developing near the different chemical potentials of the leads, are found to be cut off by spin-relaxation rates, implying that the nonequilibrium Kondo-problem remains at weak coupling as long as voltage is much larger than the Kondo temperature.

Citations

• Spin-Spin Correlators in the Majorana Representation
• Quantum field-theoretical methods in transport theory of metals
• Low Temperature Transport through a Quantum Dot: The Anderson Model out of Equilibrium
• Nonequilibrium transport through a Kondo dot in a magnetic field: Perturbation theory

Cited by

• Non-equilibrium scaling properties of a double quantum dot system: Comparison between perturbative renormalization group and flow equation approach
• Correlations in Nonequilibrium Luttinger Liquid and Singular Fredholm Determinants
• Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current
• Kondo quantum dot coupled to ferromagnetic leads: Numerical renormalization group study
• Frequency-Dependent Transport through a Quantum Dot in the Kondo Regime
• Current-Induced Decoherence in the Multichannel Kondo Problem
• Transport properties of fully screened Kondo models
• Non-equilibrium scaling analysis of the Kondo model with voltage bias