Low temperature transport through a quantum dot: finite-U results and scaling behavior
arXiv:cond-mat/0202011 · doi:10.1103/PhysRevB.65.155331
Abstract
We calculate the conductance through a quantum dot weakly coupled to metallic leads, modeled by the spin-1/2 Anderson model with finite Coulomb repulsion . We adopt the non-crossing approximation method in its finite- extension (UNCA). Our results can be compared to those obtained with the exact numerical renormalization group method, and good agreement is found both in the high temperature (Coulomb blockade) and in the low temperature (Kondo) regime. We analyze the scaling properties of the low temperature conductance, and calculate the universal function which describes the electronic transport in the Kondo regime. Very good agreement with recent experimental results is found. Finally, we suggest a simple interpolating function which fits fairly well the calculated conductance in a broad temperature range.
9 pages, 6 figures submitted to Phys. Rev. B
References in corpus (3)
Cited by in corpus (9)
- Kondo effect in coupled quantum dots: a Non-crossing approximation study
- Universal scaling in transport out of equilibrium through a single quantum dot using the noncrossing approximation
- Fano resonance in electronic transport through a quantum wire with a side-coupled quantum dot: X-boson treatment
- Revealing strong correlations in higher order transport statistics: a noncrossing approximation approach
- Kondo effect of cobalt adatom on zigzag graphene nanoribbon
- Effects of vertex corrections on diagrammatic approximations applied to the study of transport through a quantum dot
- Resolving the nonequilibrium Kondo singlet in energy- and position-space using quantum measurements
- Qualitative breakdown of the non-crossing approximation for the symmetric one-channel Anderson impurity model at all temperatures
- Quantitative comparison of Anderson impurity solvers applied to transport in quantum dots