We have investigated the acoustic plasma branch present in the longitudinal spectrum of two spatially separated parallel quasi-two-dimensional conducting layers. Our approach is based on the dielectric theory and is completely analytical within the random-phase approximation. By means of a systematic analysis we have obtained several exact results concerning the plasma dispersion relation. In particular, we have derived an exact expression for cp the acoustic plasmon group velocity in terms of the effective masses, densities and geometrical parameters of the heterostructure. We find that when the two layers are identical the system always admits a branch of acoustic plasmons as undamped modes for any finite value of the distance between the layers.

Acoustic plasmons in a conducting double-layer / Santoro, Giuseppe Ernesto; Gabriele F., Giuliani. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - 37:2(1988), pp. 937-940. [10.1103/physrevb.37.937]

Acoustic plasmons in a conducting double-layer

Santoro, Giuseppe Ernesto;
1988-01-01

Abstract

We have investigated the acoustic plasma branch present in the longitudinal spectrum of two spatially separated parallel quasi-two-dimensional conducting layers. Our approach is based on the dielectric theory and is completely analytical within the random-phase approximation. By means of a systematic analysis we have obtained several exact results concerning the plasma dispersion relation. In particular, we have derived an exact expression for cp the acoustic plasmon group velocity in terms of the effective masses, densities and geometrical parameters of the heterostructure. We find that when the two layers are identical the system always admits a branch of acoustic plasmons as undamped modes for any finite value of the distance between the layers.
1988
37
2
937
940
Santoro, Giuseppe Ernesto; Gabriele F., Giuliani
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/12551
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