Negative long wavelength dielectric constant in semiconductor QWs

Authors

S Hessami Pilehrood, University of WollongongFollow
Feng Gao, University of WollongongFollow
Zhongshui Ma, Peking UniversityFollow
Wen Xu, Australian National University
Chao Zhang, University of WollongongFollow

RIS ID

19101

Publication Details

Pilehrood, S., Gao, F., Ma, Z., Xu, W. & Zhang, C. (2007). Negative long wavelength dielectric constant in semiconductor QWs. Physica Status Solidi. C: Current Topics in Solid State Physics, 4 (2), 451-453.

Abstract

In this work we present an analytical and numerical result of the dielectric function of electronic systemswith Rashba spin-orbit interaction. By solving the quantum equation of motion for the electron densitymatrix, we obtained the dielectric function in the mean-field approximation. It is shown that when themomentum transfer q for an electronic transition is smaller than a critical value characterized by the spinorbitinteraction, the static dielectric function increases with q, indicating on-set of a new collective state.