Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-10-27
Phys. Rev. B 85, 054418 (2012)
Physics
Condensed Matter
Strongly Correlated Electrons
11 pages, 6 figures
Scientific paper
10.1103/PhysRevB.85.054418
We study non-equilibrium transport through a spin-1 Kondo dot in a local magnetic field. To this end we perform a two-loop renormalization group analysis in the weak-coupling regime yielding analytic results for (i) the renormalized magnetic field and the g-factor, (ii) the time evolution of observables and the relevant decay rates, (iii) the magnetization and anisotropy as well as (iv) the current and differential conductance in the stationary state. In particular, we find that compared to a spin-1/2 Kondo dot there exist three additional decay rates resulting in an enhanced broadening of the logarithmic features observed in stationary quantities. Additionally, we study the effect of anisotropic couplings between reservoir and impurity spin.
Andergassen Sabine
Hörig Christoph B. M.
Schuricht Dirk
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