Physics – Condensed Matter
Scientific paper
2000-01-08
Phys. Rev. B 61, 2945 (2000)
Physics
Condensed Matter
12 pages, RevTex, 11 figures, scheduled to publish in PRB Jan. 15, 2000
Scientific paper
10.1103/PhysRevB.61.2945
We study the kinetics of spin coherence of optically excited electrons in an undoped insulating ZnSe/Zn$_{1-x}$Cd$_x$Se quantum well under moderate magnetic fields in the Voigt configuration. After clarifying the optical coherence and the spin coherence, we build the kinetic Bloch equations and calculate dephasing and relaxation kinetics of laser pulse excited plasma due to statically screened Coulomb scattering and electron hole spin exchange. We find that the Coulomb scattering can not cause the spin dephasing, and that the electron-hole spin exchange is the main mechanism of the spin decoherence. Moreover the beat frequency in the Faraday rotation angle is determined mainly by the Zeeman splitting, red shifted by the Coulomb scattering and the electron hole spin exchange. Our numerical results are in agreement with experiment findings. A possible scenario for the contribution of electron-hole spin exchange to the spin dephasing of the $n$-doped material is also proposed.
Metiu Horia
Wu M. W.
No associations
LandOfFree
Kinetics of spin coherence of electrons in an undoped semiconductor quantum well 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 Kinetics of spin coherence of electrons in an undoped semiconductor quantum well, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetics of spin coherence of electrons in an undoped semiconductor quantum well will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-186416