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Abstract:
A new class of single-particle excitations in tunnel-coupled electron
bilayers is investigated by inelastic light scattering. The dispersion
law and the dependence of the energies of these excitations on the
degree of unbalance between the layers have been measured. A new
spectroscopic method is proposed for determining the degree of
unbalance between bilayers. (C) 2003 MAIK "Nauka/Interperiodica".