Many-body origin of the “trion line” in doped quantum wells M. Combescot, J. Tribollet, G. Karczewski, F. Bernardot, C. Testelin and M. Chamarro Europhys. Lett., 71 3 (2005) 431-437 Published online: 13 July 2005 DOI: 10.1209/epl/i2005-10101-8