The Fermi edge singularity of spin polarized electrons

Details The Fermi edge singularity of spin polarized electrons The Fermi edge singularity of spin polarized electrons

2006-12-31

arxiv.org/abs/cond-mat/0701010v2

PRL 98, 186810 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.98.186810

We study the absorption spectrum of a two-dimensional electron gas (2DEG) in a magnetic field. We find that that at low temperatures, when the 2DEG is spin polarized, the absorption spectra, which correspond to the creation of spin up or spin down electron, differ in magnitude, linewidth and filling factor dependence. We show that these differences can be explained as resulting from creation of a Mahan exciton in one case, and of a power law Fermi edge singularity in the other.

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