| Issue |
Europhys. Lett.
Volume 59, Number 4, August 2002
|
|
|---|---|---|
| Page(s) | 579 - 585 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and opticalproperties | |
| DOI | https://doi.org/10.1209/epl/i2002-00296-0 | |
| Published online | 01 August 2002 | |
Effective bosonic Hamiltonian for excitons: A too naive concept
GPS, Université Denis Diderot and Université Pierre
et Marie Curie, CNRS Tour 23, 2 place Jussieu, 75251 Paris
Cedex 05, France
Received:
24
January
2002
Accepted:
15
May
2002
Excitons, being made of two fermions, may appear from far as bosons. Their close-to-boson character is however quite tricky to handle properly. Using our commutation technique especially designed to deal with interacting close-to-boson particles, we here calculate the exact expansion in Coulomb interaction of the exciton-exciton correlations, and show that a naive effective bosonic Hamiltonian for excitons cannot produce these X-X correlations correctly.
PACS: 71.35.-y – Excitons and related phenomena
© EDP Sciences, 2002
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