Full counting statistics for orbital-degenerate impurity Anderson model with Hund's rule exchange coupling

Details Full counting statistics for orbital-degenerate impurity Anderson model with Hund's rule exchange coupling Full counting statistics for orbital-degenerate impurity Anderson model with Hund's rule exchange coupling

2012-01-10

arxiv.org/abs/1201.1957v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures

Scientific paper

We study non-equilibrium current fluctuations through a quantum dot, which includes a ferromagnetic Hund's rule coupling $J$, in the low-energy Fermi liquid regime using the renormalized perturbation theory. The resulting cumulant for the current distribution in the particle-hole symmetric case, shows that spin-triplet and Kondo-spin-singlet pairs of quasiparticles are formed in the current due to the Hund's rule coupling and these pairs enhance the current fluctuations. In the fully screened higher-spin Kondo limit, the Fano factor takes a value $F_b = (9M+6)/ (5M+4)$ determined by the orbital degeneracy $M$. We also investigate crossover between the small and large $J$ limits in the two-orbital case M=2, using the numerical renormalization group approach.

Affiliated with

Also associated with

No associations

Rating

Full counting statistics for orbital-degenerate impurity Anderson model with Hund's rule exchange coupling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Full counting statistics for orbital-degenerate impurity Anderson model with Hund's rule exchange coupling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Full counting statistics for orbital-degenerate impurity Anderson model with Hund's rule exchange coupling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-461717