Collective Modes in Strongly Coupled Elecronic Bilayer Liquids
Abstract
We present the first reliable calculation of the collective mode structure of a strongly coupled electronic bilayer. The calculation is based on a classical model through the
3
rd
frequency-moment-sum-rule preserving Quasi Localized Charge Approximation, using the recently calculated Hypernetted Chain pair correlation functions. The spectrum shows an energy gap at
k=0
and the absence of a previously conjectured dynamical instability.