Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-06-22
Phys. Rev. B 76, 233302 (2007)
Physics
Condensed Matter
Other Condensed Matter
5 pages, 4 Postscript figures, to be published in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.76.233302
We calculate the exchange coupling J between electrons in a double-well potential in a two-dimensional semiconductor environment within the Heitler-London (HL) approach. Two functional forms are considered for the double-well potential. We show that by choosing an appropriate and relatively simple single-electron variational wave function it is possible, within the HL approach, to significantly improve the estimates for J. In all cases the present scheme overcomes the artifacts and limitations at short interdot distances, previously attributed to the HL method, where unphysical triplet ground states have been found, and leads to an overall agreement with analytic interpolated expressions for J obtained for a donor-type model potential.
Calderon M. J.
Koiller Belita
Saraiva A. L.
No associations
LandOfFree
Reliability of the Heitler-London approach for the exchange coupling between electrons in semiconductor nanostructures 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 Reliability of the Heitler-London approach for the exchange coupling between electrons in semiconductor nanostructures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reliability of the Heitler-London approach for the exchange coupling between electrons in semiconductor nanostructures will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-188053