Scaling properties of the Anderson model in the Kondo regime studied by formalism
arXiv:1011.1275 · doi:10.1103/PhysRevB.82.195111
Abstract
The symmetric Anderson model for a single impurity coupled to two leads is studied at strong interaction using the GW approximation within the formalism. We find that the low energy properties show universal scaling behavior in the asymptotic regime. While the GW scaling functions are similar in form to the scaling functions known from the numerically exact solution, they are characterized by a different parameter value indicating that GW fails to describe correctly spin correlations between the impurity and lead electrons. We also compare the GW and exact Kondo scales for a broad range of the interaction strength. In contrast to the exponential behavior shown by the exact solution, the GW Kondo scale depends algebraically on the interaction strength.
accepted for publication in Phys. Rev. B
References in corpus (9)
- Kondo effect in quantum dots
- Conserving GW scheme for nonequilibrium quantum transport in molecular contacts
- Weak-coupling quantum Monte Carlo calculations on the Keldysh contour: theory and application to the current-voltage characteristics of the Anderson model
- Successes and Failures of Kadanoff-Baym Dynamics in Hubbard Nanoclusters
- Kondo Conductance in an Atomic Nanocontact from First Principles
- Electronic correlation in nanoscale junctions: Comparison of the GW approximation to a numerically exact solution of the single-impurity Anderson model
- Universal dephasing rate due to diluted Kondo impurities
- Many-body electronic structure and Kondo properties of cobalt-porphyrin molecules
- Ward identities for the Anderson impurity model: derivation via functional methods and the exact renormalization group