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Collective Modes in Classical Mass‐Asymmetric Bilayers
Author(s) -
Golden K. I.,
Kalman G. J.,
Hartmann P.,
Donkó Z.
Publication year - 2012
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201100068
Subject(s) - asymmetry , bilayer , coulomb , physics , condensed matter physics , dipole , coupling (piping) , random phase approximation , dispersion (optics) , phase (matter) , quasiparticle , charge (physics) , electron , materials science , quantum mechanics , membrane , chemistry , biochemistry , superconductivity , metallurgy
Using the quasi‐localized charge approximation (QLCA), we analyze the effects of asymmetry on the long‐wavelength longitudinal collective mode dispersion in a variety of strongly correlated electronic bilayer liquids, most notably, the mass‐asymmetric electron‐hole bilayer in its Coulomb liquid and dipole liquid phases. We point out the marked differences between the strong coupling (QLCA) and weak coupling (random‐phase‐approximation) descriptions of the way the asymmetry affects the collective mode structure (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)