Plasmons in coupled bilayer structures
Strongly Correlated Electrons
2009-10-31 v1
Abstract
We calculate the collective charge density excitation dispersion and spectral weight in bilayer semiconductor structures {\it including effects of interlayer tunneling}. The out-of-phase plasmon mode (the ``acoustic'' plasmon) develops a long wavelength gap in the presence of tunneling with the gap being proportional to the square root (linear power) of the tunneling amplitude in the weak (strong) tunneling limit. The in-phase plasmon mode is qualitatively unaffected by tunneling. The predicted plasmon gap should be a useful tool for studying many-body effects.
Cite
@article{arxiv.cond-mat/9810374,
title = {Plasmons in coupled bilayer structures},
author = {S. Das Sarma and E. H. Hwang},
journal= {arXiv preprint arXiv:cond-mat/9810374},
year = {2009}
}
Comments
10 pages, 6 figures. to appear in Phys. Rev. Lett