On dielectric response and quasiparticles in semiconductors and insulators

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Some aspects of dielectric response pertinent to the calculation of quasiparticle energies are discussed. A new generalized plasmon-pole concept to treat the frequency dependence of the dielectric matrix is presented. The scheme based on the framework of the dielectric bandstructure implies a faster convergence when calculating the quasiparticle selfenergy. Moreover it has the merit that the dielectric matrix always has the correct analytical properties. To visualize the polarization cloud around a quasiparticle in a semiconductor the dielectric response for a test charge is studied. This leads to a natural subdivision of the electronic polarization in a semiconductor into charge transfer and dipolar polarization. The relative size of these contributions provides a measure for the importance of local field effects.
Original languageEnglish
Pages (from-to)613
Number of pages1
JournalPhysica scripta
Volume38
Issue number4
DOIs
Publication statusPublished - 1988

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Quasiparticles
Insulator
Semiconductors
insulators
Polarization
polarization
subdivisions
Plasmon
Charge Transfer
Band Structure
Local Field
matrices
Subdivision
Pole
poles
charge transfer
Charge
Electronics
Imply
Energy

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On dielectric response and quasiparticles in semiconductors and insulators. / Horsch, Peter; Linden, Wolfgang von der.

In: Physica scripta, Vol. 38, No. 4, 1988, p. 613.

Research output: Contribution to journalArticleResearchpeer-review

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