Long-lived charged multiple-exciton complexes in strong magnetic fields
Condensed Matter
2009-10-28 v1
Abstract
We consider the charged exciton complexes of an ideal two-dimensional electron-hole system in the limit of strong magnetic fields. A series of charged multiple-exciton states is identified and variational and finite-size exact diagonalization calculations are used to estimate their binding energies. We find that, because of a hidden symmetry, bound states of excitons and an additional electron cannot be created by direct optical absorption and, once created, have an infinite optical recombination lifetime. We also estimate the optical recombination rates when electron and hole layers are displaced and the hidden symmetry is violated.
Cite
@article{arxiv.cond-mat/9603194,
title = {Long-lived charged multiple-exciton complexes in strong magnetic fields},
author = {J. J. Palacios and D. Yoshioka and A. H. MacDonald},
journal= {arXiv preprint arXiv:cond-mat/9603194},
year = {2009}
}
Comments
12 pages + 2 PostScript figures, Revtex, Submitted to Phys. Rev. Lett