Statistical mechanics of screened spatially indirect excitons

Details Statistical mechanics of screened spatially indirect excitons Statistical mechanics of screened spatially indirect excitons

2001-11-20

arxiv.org/abs/cond-mat/0111384v1

phys. stat. sol. (a) 190, 655 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 2 figures

Scientific paper

We study thermodynamic properties of spatially separated electron-hole plasma in double-layered systems using Green function formalism. The screening of the Coulomb interaction is considered in the framework of Thomas-Fermi approximation, and a qualitatively new mechanism of screening by indirect excitons is taken into account. The exciton density is shown to decrease sharply with increasing electron-hole separation up to one exciton Born radius. The strong mutual enhancement of screening and charge-separation effects is found.

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