Photon absorption and collective excitations in spintronic superlattices

Authors

Chao Zhang, University of WollongongFollow
Feng Gao, University of WollongongFollow
C. H. Yang, Chinese Academy of SciencesFollow

RIS ID

19501

Publication Details

Zhang, C., Gao, F. & Yang, C. (2007). Photon absorption and collective excitations in spintronic superlattices. Journal of Materials Science: Materials in Electronics, 18 (Supplement 1), 87-91.

Abstract

We calculate the electron density responsefunction of electron-hole multilayer systems in the presenceof spin-orbit interaction modeled by Rashba terms. Itis found that the spin-orbit coupling leads to a redistributionof the absorption spectral weight between the particleholeexcitation and the plasmon excitation. The interplay ofCoulomb interactions and spin-orbit interaction resulted ina suppression or enhancement of the optical absorption dueto plasmons. Our result indicates that the spin-orbit couplingcan serve as a tuning mechanism for opticalabsorption in spintronics systems.