Collective Modes in Strongly Coupled Elecronic Bilayer Liquids
G. Kalman, V. Valtchinov, K. I. Golden
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 3rd 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.
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