Open AccessStatistical Mechanics of Screened Spatially Indirect Excitons
Author(s) -
Nikolaev V.V.,
Portnoi M.E.
Publication year - 2002
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
eISSN - 1521-396X
pISSN - 0031-8965
DOI - 10.1002/1521-396x(200204)190:3<655::aid-pssa655>3.0.co;2-7
Subject(s) - exciton , bohr radius , coulomb , biexciton , formalism (music) , physics , electron , condensed matter physics , bohr model , radius , quantum mechanics , art , musical , computer security , computer science , visual arts
We study thermodynamic properties of spatially separated electron–hole plasma in double‐layered systems using the 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 Bohr radius. The strong mutual enhancement of screening and charge‐separation effects is found.