2004/09/15 by M. Combescot, Monique Combescot, Combescot, M. +11
Physics and Astronomy · #Atomic and Subatomic Physics Research #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0409395
11 pages, 4 figures
arxiv created 2004/09/15 · arxiv updated 2009/12/01
We show that the so-called "trion line" in the absorption spectrum of doped quantum wells, comes from a singular many-body object, intrinsically wide in energy: the photocreated virtual exciton dressed by Coulomb and Pauli interactions with the well carriers. This understanding is supported by the spectra of circular dichroism obtained with a spin-polarized Fermi sea: the sharp edge on the low-energy side and the significant tail at high energies are well explained by these many-body effects, not by bound 3-body trions.