https://doi.org/10.1140/epjb/e2002-00387-2
Plasmons in asymmetric double quantum well structures
1
Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080, PR China
2
Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080, PR China
CCAST (World Laboratory), PO Box 8730, and Institute of Physics, Chinese Academy of Sciences, PO Box
603, Beijing 100080, PR China
Corresponding author: a c412-1@aphy.iphy.ac.cn
Received:
2
July
2002
Published online:
19
December
2002
We investigate the effects of spatial asymmetry, tunneling
coupling, and exchange-correlation correction on the plasmon modes
in asymmetric double quantum well (DQW) structures in a
time-dependent local-density approximation. Special attention is
paid to the properties of the 
mode which is always
damped in symmetric DQW systems. In addition, the results on the
spectral weight of the excitations are also presented. In general,
all the modes carry finite spectral weights and should be
observable in resonant inelastic light scattering experiments for
the specified values of the parameters.
PACS: 71.15.-m – Methods of electronic structure calculations / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) / 73.21.-b – Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
