Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2000-05-15
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 7 figures
Scientific paper
10.1103/PhysRevB.62.13561
We present exact solutions for two interacting electrons on an artificial atom and on an artificial molecule made by one and two (single level) quantum dots connected by ideal leads. Specifically, we calculate the accumulated charge on the dots as function of the gate voltage, for various strengths of the electron-electron interaction and of the hybridization between the dots and the (one-dimensional) leads. With increasing of the (negative) gate voltage, the accumulated charge in the two-electron ground state increases in gradual steps from 0 to 1 and then to 2. The value 0 represents an "insulating" state, where both electrons are bound to shallow states on the impurities. The value of 1 corresponds to a "metal", with one electron localized on the dots and the other extended on the leads. The value of 2 corresponds to another "insulator", with both electrons strongly localized. The width of the "metallic" regime diverges with strength of the electron-electron interaction for the single dot, but remains very narrow for the double dot. These results are contrasted with the simple Coulomb blockade picture.
Aharony Amnon
Entin-Wohlman Ora
Imry Yoseph
Levinson Yehoshua
No associations
LandOfFree
Charge occupancy of two interacting electrons on artificial molecules - exact results 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 Charge occupancy of two interacting electrons on artificial molecules - exact results, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge occupancy of two interacting electrons on artificial molecules - exact results will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-102917