Frequency-dependent transport through a quantum dot in the Kondo regime

Abstract

We study the AC conductance and equilibrium current fluctuations of a Coulomb blockaded quantum dot. A relation between the equilibrium spectral function and the linear AC conductance is derived which is valid for frequencies well below the charging energy of the quantum dot. Frequency-dependent transport measurements can thus give experimental access to the Kondo peak in the equilibrium spectral function of a quantum dot. We illustrate this in detail for typical experimental parameters using the numerical renormalization group method in combination with the Kubo formalism.

4 pages, 4 figures

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• Kondo quantum dot coupled to ferromagnetic leads: Numerical renormalization group study
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• Kondo blockade due to quantum interference in single-molecule junctions
• Two-stage Kondo effect in side-coupled quantum dots: Renormalized perturbative scaling theory and Numerical Renormalization Group analysis
• Many-body Correlation Effect on Mesoscopic Charge Relaxation
• Quantum Criticality in Ferromagnetic Single-Electron Transistors
• Non-equilibrium frequency-dependent noise through a quantum dot: A real time functional renormalization group approach
• Dynamical conductance in the two-channel Kondo regime of a double dot system
• Magnetic field effects on the finite-frequency noise and ac conductance of a Kondo quantum dot out of equilibrium
• Noise of Kondo dot with ac gate: Floquet-Green's function and Noncrossing Approximation Approach
• Transport in a hybrid normal-topological superconductor Kondo model
• Theory of frequency-dependent spin current noise through correlated quantum dots
• Finite-frequency thermoelectric response in strongly correlated quantum dots
• Spin-resolved dynamical conductance of correlated large-spin magnetic molecules
• Theory of a.c. spin current noise and spin conductance through a quantum dot in the Kondo regime I: The equilibrium case
• Dynamical spin accumulation in large-spin magnetic molecules
• The Wiedemann-Franz law in the SU(N) Wolff model
• Far-infrared absorption in single-electron transistors: Theoretical results and experiment proposal
• Out-of-equilibrium fluctuation-dissipation relations verified by the electrical and thermoelectrical ac-conductances in a quantum dot
• Non-equilibrium charge noise and dephasing from a spin-incoherent Luttinger liquid