Renormalized Bosonic Interaction of Excitons

Details Renormalized Bosonic Interaction of Excitons Renormalized Bosonic Interaction of Excitons

1999-05-07

arxiv.org/abs/cond-mat/9905085v1

Physics

Condensed Matter

Materials Science

2 figures

Scientific paper

10.1103/PhysRevB.61.2863

An effective bosonic Hamiltonian of $1s$ excitons with ``spin'' degrees of freedom in two dimension is obtained through a projection procedure, starting from a conventional electron-hole Hamiltonian ${\cal H}_{eh}$. We first demonstrate that a straightforward transformation of ${\cal H}_{eh}$ into a Hamiltonian of bosonic excitons does not give the two-body interaction between an ``up-spin'' exciton and a ``down-spin'' exciton, which are created by the left- and right-circularly polarized light beams, respectively. We then show that this interaction is generated through a projection procedure onto the subspace spanned by $1s$ excitons, as a renormalization effect coming from higher exciton states. The projection also renormalizes the interaction between $1s$ excitons with the same spins by a large amount. These renormalization effects are crucial for the polarization dependence of the optical responses from semiconductors. The present theory gives the microscopic foundation of the phenomenology that was successfully applied to the analysis of four-wave mixing experiments in GaAs quantum wells strongly coupled to the radiation field in a high-Q micro cavity.

Affiliated with

Also associated with

No associations

Rating

Renormalized Bosonic Interaction of Excitons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Renormalized Bosonic Interaction of Excitons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Renormalized Bosonic Interaction of Excitons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-598897