π‐Plasmon Dispersion of Trans‐(CH)<sub>x</sub> at Small Momentum Transfer by Electron Energy Loss Spectroscopy

Zscheile, H.; Gründler, R.; Dahms, Uwe; Fröhner, J.; Lehmann, G.

doi:10.1002/pssb.2221210247

Cited by 10 publications

(2 citation statements)

References 5 publications

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“…The reason, why in models 3 and 4 the features produced by the G's being perpendicular to the chains dominate is that these Fourier components are much larger than that component produced by the Peierls doubling. The fact that the minimum a t q = 0 in disordered fibrous samples [3] is much more pronounced than in quasi-crystalline ones (for q parallel to the chains [ 2 ] ) is a n indirect proof for our finding that this anomaly is more pronounced for q perpendicular to the chains than parallel. …”

Section: Numerical Resultssupporting

confidence: 59%

Plasmon Dispersion in Trans‐Polyacetylene

Haase¹,

Taut²

1989

Physica Status Solidi (b)

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By frequency momentum analysis, the plasmon dispersion of crystalline trans-polyacetylene is calculated for q parallel and perpendicular to the chains. Both experimentally observed features: linear dispersion a t medinm q, and a drop for small q, are obtained. It is suggested that the latter feature is much more pronounced for q perpendicular to the chains (not investigated experimentally) than parallel.Mittels Frequenzimpulsanalyse wird die Plasmondispersion von kristallinem Trans-Polyaxetylen fur q parallel und senkrecht zur Kette berechnet. Beide experimentell beobachteten Charakteristiken: die lineare Dispersion bei mittlerem g und ein Abfall fur kleine q, werden erhalten. Es wird angenommen, dal3 die letztere Charakteristik vie1 ausgeprilgter fur q senkrecht als parallel zur Kette ist (experimentell nicht untersucht).

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Section: Numerical Resultssupporting

confidence: 59%

Plasmon Dispersion in Trans‐Polyacetylene

Haase¹,

Taut²

1989

Physica Status Solidi (b)

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“…Schulz Furthermore they calculated the dispersion of the plasmon peak in -1m E-1 and succeeded in reproducing the linear dispersion of the plasma frequency as derived by Ritsko [55] from electron-energy-loss spectra. Recent electron-energy-loss experiments however showed a stronger plasmon dispersion at low wave numbers [56].…”

Section: Optical Properties Of Trans-polyacetylenementioning

confidence: 99%

Physical Properties of Polyacetylene

Streitwolf¹

1985

Physica Status Solidi (b)

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Dielectric Properties of Trans‐Polyacetylene. I. The Macroscopic Longitudinal Dielectric Function of a Peierls‐Fröhlich Semiconductor of Commensurability 2 within RPA

Drechsler

Bobeth

1985

Physica Status Solidi (b)

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The macroscopic longitudinal wave-vector-and frequency-dependent dielectric function (MLDF) of a Peierls-Frohlich semiconductor with one electron per site is calculated within the 3D-approach of Lee and Kivelson based on the Su-Schrieffer-Heeger model. Local field and exchange effects as well as overlap terms in the calculation of the matrix elements of the charge density are neglected. Conditions for the occurrence of an interband plasmon are presented, which are fulfilled in trans-(CH),. Special attention is paid to the q-dependence of the MLDF and the influence of the interchain hopping.Die makroskopische longitudinale wellenvektor-and frequenzabhangige dielektrische Funktion (MLDF) fur einen Peierls-Frohlich-Halbleiter mit einem Elektron pro Gitterplatz wird im Rahmen einer von Lee und Kivelson vorgeschlagenen 3D-Naherung, die auf dem Su-Schrieffer-HeegerModel1 beruht, berechnet. Sowohl Lokalfeld-und Austauscheffekte als auch Uberlappungsterme bei der Berechnung der Ladungsdichtematrixelemente werden vernachllssigt. Es werden Bedingungen fur das Auftreten von Plasmonen im Bereich der Interbandubergange angegeben, die fur (CH), erfullt sind. Insbesondere wird die q-Abhangigkeit der MLDF und der EinfluR des Zwischenketten-Hoppingintegrals untersucht.

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π‐Plasmon Dispersion of Trans‐(CH)_x at Small Momentum Transfer by Electron Energy Loss Spectroscopy

Cited by 10 publications

References 5 publications

Plasmon Dispersion in Trans‐Polyacetylene

Plasmon Dispersion in Trans‐Polyacetylene

Physical Properties of Polyacetylene

Dielectric Properties of Trans‐Polyacetylene. I. The Macroscopic Longitudinal Dielectric Function of a Peierls‐Fröhlich Semiconductor of Commensurability 2 within RPA

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π‐Plasmon Dispersion of Trans‐(CH)x at Small Momentum Transfer by Electron Energy Loss Spectroscopy

Cited by 10 publications

References 5 publications

Plasmon Dispersion in Trans‐Polyacetylene

Plasmon Dispersion in Trans‐Polyacetylene

Physical Properties of Polyacetylene

Dielectric Properties of Trans‐Polyacetylene. I. The Macroscopic Longitudinal Dielectric Function of a Peierls‐Fröhlich Semiconductor of Commensurability 2 within RPA

Contact Info

Product

Resources

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π‐Plasmon Dispersion of Trans‐(CH)_x at Small Momentum Transfer by Electron Energy Loss Spectroscopy