Electron spin and charge switching in a coupled quantum dot quantum ring system

Details Electron spin and charge switching in a coupled quantum dot quantum ring system Electron spin and charge switching in a coupled quantum dot quantum ring system

2004-06-22

arxiv.org/abs/cond-mat/0406533v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to appear in PRB in August 2004

Scientific paper

10.1103/PhysRevB.70.125310

Few-electron systems confined in a quantum dot laterally coupled to a surrounding quantum ring in the presence of an external magnetic field are studied by exact diagonalization. The distribution of electrons between the dot and the ring is influenced by the relative strength of the dot and ring confinement, the gate voltage and the magnetic field which induces transitions of electrons between the two parts of the system. These transitions are accompanied by changes in the periodicity of the Aharonov-Bohm oscillations of the ground-state angular momentum. The singlet-triplet splitting for a two electron system with one electron confined in the dot and the other in the ring exhibits piecewise linear dependence on the external field due to the Aharonov-Bohm effect for the ring-confined electron, in contrast to smooth oscillatory dependence of the exchange energy for laterally coupled dots in the side-by-side geometry.

Affiliated with

Also associated with

No associations

Rating

Electron spin and charge switching in a coupled quantum dot quantum ring system 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 Electron spin and charge switching in a coupled quantum dot quantum ring system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron spin and charge switching in a coupled quantum dot quantum ring system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-669471