Commutation technique for interacting close-to-boson excitons |
| |
Authors: | O Betbeder-Matibet M Combescot |
| |
Institution: | (1) GPS, Université Denis Diderot and Université Pierre et Marie Curie, CNRS, Tour 23, 2 place Jussieu, 75251 Paris Cedex 05, France, FR |
| |
Abstract: | The correct treatment of the close-to-boson character of excitons is known to be a major problem. In a previous work, we have
proposed a “commutation technique” to include this close-to-boson character in their interactions. We here extend this technique
to excitons with spin degrees of freedom as they are of crucial importance for many physical effects. Although the exciton
total angular momentum may appear rather appealing at first, we show that the electron and hole angular momenta are much more
appropriate when dealing with scattering processes. As an application of this commutation technique to a specific problem,
we reconsider a previous calculation of the exciton-exciton scattering rate and show that the proposed quantity is intrinsically
incorrect for fundamental reasons linked to the fermionic nature of the excitons.
Received 25 October 2001 Published online 25 June 2002 |
| |
Keywords: | PACS 71 35 -y Excitons and related phenomena |
本文献已被 SpringerLink 等数据库收录! |
|