LCHO-CI method for the voltage control of exchange interaction in gated lateral quantum dot networks
Mesoscale and Nanoscale Physics
2007-06-08 v1 Materials Science
Abstract
We present a computational LCHO-CI approach allowing for the simulation of exchange interactions in gated lateral quantum dot networks. The approach is based on single-particle states calculated using a linear combination of harmonic orbitals (LCHO) of each of the dots, and a configuration interaction (CI) approach to the interacting electron problem. The LCHO-CI method is applied to a network of three quantum dots with one electron spin per dot, and a Heisenberg spin Hamiltonian is derived. The manipulation of spin states of a three-spin molecule by applying bias to one of the dots is demonstrated and related to the bias dependence of effective exchange interaction parameters.
Keywords
Cite
@article{arxiv.0706.0905,
title = {LCHO-CI method for the voltage control of exchange interaction in gated lateral quantum dot networks},
author = {Irene Puerto-Gimenez and Marek Korkusinski and Pawel Hawrylak},
journal= {arXiv preprint arXiv:0706.0905},
year = {2007}
}
Comments
23 pages, 7 figures, submitted to Phys. Rev. B