The size effects of an exciton in a nano-ring are investigated theoretically by using an effective-mass Hamiltonian which can be separated in terms of the center-of-mass and relative coordinates. The binding energy and oscillator strength of the ground state are calculated for two different ring radii as a function of the ring width. The resulting linear optical susceptibility of the low-lying exciton states is also discussed.
@article{arxiv.cond-mat/0009044,
title = {Size effects on excitons in nano-rings},
author = {Hui Hu and Dai-Jun Li and Jia-Lin Zhu and Jia-Jiong Xiong},
journal= {arXiv preprint arXiv:cond-mat/0009044},
year = {2009}
}
Comments
4 pages, 4 figures, accepted by J. Phys: Condens. Matter