Ladder approximation in coupled quantum-well systems

Date
2001
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Source Title
Physical Review B - Condensed Matter and Materials Physics
Print ISSN
0163-1829
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Publisher
American Physical Society
Volume
63
Issue
12
Pages
125320-1 - 125320-5
Language
English
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Abstract

We study the contact values of the interlayer pair-correlation function in electron-electron and electron-hole double-layer systems. For this purpose the ladder approximation as generalized to multicomponent systems is used. The ladder approximation yields positive values for the interlayer gee(0) and geh(0) for all values of the density parameter rs and layer spacing d. This allows us to infer possible instabilities in the system more reliably compared to other approaches. We also investigate the effects of quantum-well width and screening on the interlayer pair-correlation functions.

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