Single electron charging of impurity sites visualized by scanning gate experiments on a quantum point contact

Details Single electron charging of impurity sites visualized by scanning gate experiments on a quantum point contact Single electron charging of impurity sites visualized by scanning gate experiments on a quantum point contact

2006-07-06

arxiv.org/abs/cond-mat/0607161v1

Phys. Rev. B 75, 045433 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.75.045433

A quantum point contact (QPC) patterned on a two-dimensional electron gas is investigated with a scanning gate setup operated at a temperature of 300 mK. The conductance of the point contact is recorded while the local potential is modified by scanning the tip. Single electron charging of impurities induced by the local potential is observed as a stepwise conductance change of the constriction. By selectively changing the state of some of these impurities, it is possible to observe changes in transmission resonances of the QPC. The location of such impurities is determined, and their density is estimated to be below 50 per \mu m^2, corresponding to less than 1 % of the doping concentration.

Affiliated with

Also associated with

No associations

Rating

Single electron charging of impurity sites visualized by scanning gate experiments on a quantum point contact 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 Single electron charging of impurity sites visualized by scanning gate experiments on a quantum point contact, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single electron charging of impurity sites visualized by scanning gate experiments on a quantum point contact will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-45349