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Dielectric function of degenerate InSb: Beyond the hydrodynamic model

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Bell, Gavin R., Veal, T. D. (Tim D.), Frost, J. A. and McConville, C. F. (Chris F.) (2006) Dielectric function of degenerate InSb: Beyond the hydrodynamic model. Physical Review B (Condensed Matter and Materials Physics), 73 (15). doi:10.1103/PhysRevB.73.153302

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Official URL: http://dx.doi.org/10.1103/PhysRevB.73.153302

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Abstract

The plasmon excitations of the degenerate free-electron gas in the surface space-charge region of InSb have been studied using high-resolution electron-energy-loss spectroscopy. Semiclassical dielectric theory simulations of the energy-loss spectra have been performed using the hydrodynamic and Boltzmann-Mermin models. While both analyses include the effects of temperature, conduction band nonparabolicity, spatial dispersion and collisional damping, the hydrodynamic model is not able to quantitatively reproduce the experimental spectra at higher excitation wave vectors. The measured spectral shapes are only accurately reproduced when collisionless plasmon damping is included explicitly using the Boltzmann-Mermin dielectric function.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 7 April 2006
Dates:
DateEvent
14 December 2005Submitted
7 April 2006Published
Volume: 73
Number: 15
Number of Pages: 3
DOI: 10.1103/PhysRevB.73.153302
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

Data sourced from Thomson Reuters' Web of Knowledge

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