Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime

Details Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime

2004-06-15

arxiv.org/abs/cond-mat/0406323v1

Phys. Rev. B 72, 121302(R) (2005)

Physics

Condensed Matter

Materials Science

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.72.121302

The effect of a gate voltage ($V_g$) on the spin-splitting of an electronic level in a quantum dot (QD) attached to ferromagnetic leads is studied in the Kondo regime using a generalized numerical renormalization group technique. We find that the $V_g$-dependence of the QD level spin-splitting strongly depends on the shape of the density of states (DOS). For one class of DOS shapes there is nearly no $V_g$-dependence, for another, $V_g$ can be used to control the magnitude and sign of the spin-splitting, which can be interpreted as a local exchange magnetic field. We find that the spin-splitting acquires a new type of logarithmic divergence. We give an analytical explanation for our numerical results and explain how they arise due to spin-dependent charge fluctuations.

Affiliated with

Also associated with

No associations

Rating

Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime 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 Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-346791