Collective excitations, pressure, and compressibility in multilayer systems
- 15 July 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 48 (3) , 1665-1668
- https://doi.org/10.1103/physrevb.48.1665
Abstract
We present a simple method to calculate the spectrum of elementary collective excitations in semiconductor superlattices. It is based on a variational many-body calculation with the hypernetted-chain approximation and the transformation of the structure functions and other quantities depending on the lattice layer indices into Bloch sums. In this method, we can calculate the excitation spectrum for electron and electron-hole superlattices and other more complicated structures. We also calculate the pressure and compressibility in a system of arbitrarily many electron (or hole) gas layers.Keywords
This publication has 18 references indexed in Scilit:
- Coupled electron-hole transportPhysical Review Letters, 1992
- Negative compressibility of interacting two-dimensional electron and quasiparticle gasesPhysical Review Letters, 1992
- Dispersion of a layered electron gas with nearest neighbour-tunnelingZeitschrift für Physik B Condensed Matter, 1989
- Novel collective excitation spectrum and lifetime of electrons in a tunneling semiconductor superlatticePhysics Letters A, 1989
- Collective excitations of a multiple-quantum-well system with barrier of finite heightPhysical Review B, 1988
- Many-body effects in a layered electron gasPhysical Review B, 1988
- Inelastic light scattering by collective charge-density excitations in GaAs-As superlatticesPhysical Review B, 1987
- Acoustic surface plasmons in type-II semiconducting superlatticesPhysical Review B, 1983
- Collective excitations in semiconductor superlatticesPhysical Review B, 1982
- Plasma Frequency of the Electron Gas in Layered StructuresPhysical Review B, 1973