Plasmon Dispersion and Anisotropy in Polymeric Sulfur Nitride,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mi mathvariant="normal">SN</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>

Chen, C. H.; Silcox, J.; Garito, A. F.; Heeger, Alan J.; MacDiarmid, Alan G.

doi:10.1103/physrevlett.36.525

Cited by 53 publications

(8 citation statements)

References 17 publications

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“…5. Our data lie slightly below the single crystal data [6] (full circles), in agreement with the lower plasma energy in epitaxial films obtaind from reflectiv-…”

Section: Bulk and Surface Plasmonssupporting

confidence: 87%

“…Now, a series of experiments [2,6 to 81 classifies (SN), as an anisotropic three-dimensional metal. Chen et al [6] first reported electron energy loss measurements on crystalline (SN), showing also a plasmon with polarization perpendicular to the chain axis. It was the aim of this work to extend these investigations concerning the range of momentum transfer and to perform a KKA of the spectra in order to compare it to existing optical data.…”

Section: Introductionmentioning

confidence: 97%

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Optical properties and plasmon dispersion in epitaxial (SN)_x by electron energy loss spectroscopy

Stolz

Petri

Otto

1977

Physica Status Solidi (b)

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Wavevector dependent electron energy loss spectra of epitaxial films of (SN), between 0 to 30 eV up to wave vector transfers of 1 A-l are measured for k parallel and perpendicular to the chain axis. The optical constants el, e2 and the reflectivity R are derived by a Kramers-Kronig analysis for zero wavevector. Peak positions in R agree with optical measurements. A change in the dispersion of the bulk plasmon of the conduction electrons is attributed to the interference with free-electron-like single particle excitations.

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“…5. Our data lie slightly below the single crystal data [6] (full circles), in agreement with the lower plasma energy in epitaxial films obtaind from reflectiv-…”

Section: Bulk and Surface Plasmonssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 97%

Optical properties and plasmon dispersion in epitaxial (SN)_x by electron energy loss spectroscopy

Stolz

Petri

Otto

1977

Physica Status Solidi (b)

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“…Measurements of the plasmon dispersion in the context of quasi-one-dimensional conducting compounds have been reported up to now only for the organic charge-transfer salt TTF-TCNQ, 27 for polymeric (SN) x , 28 and recently for the transition metal tetrachalco-halogenide (TaSe 4 ) 2 I. 29 For the latter compound, a quasilinear plasmon-dispersion relation over a wide momentum range for the direction parallel to the 1D axis was found.…”

Section: Introductionmentioning

confidence: 99%

“…The zero crossing of the real part of the dielectric function was then calculated in Ref. 28 as a function of the propagation angle according to ʈ cos 2 ()ϩ Ќ sin 2 () ϭ0 to give the plasmon energy. A cos dependence for the plasmon energy was thereby arrived at, as predicted from all theoretical models neglecting the interchain coupling as far as mediated by a finite transverse electron-hopping probability.…”

Section: Introductionmentioning

confidence: 99%

Plasmon excitations in quasi-one-dimensionalK0.3MoO3

Sing¹,

Grigoryan²,

Paasch³

et al. 1999

Phys. Rev. B

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We present an investigation of the plasmon excitations in a quasi-one-dimensional metal, the blue bronze K 0.3 MoO 3 . The dispersion relation along the one-dimensional direction, as measured by electron energy-loss spectroscopy in transmission, is quasilinear over a wide momentum range before it exhibits a negative curvature. We show that the quasilinear part can be explained within an essentially three-dimensional model based on the random-phase approximation. Band-structure effects are thereby considered through the Ehrenreich-Cohen formula, tailor-made to the specific, strongly anisotropic material. From this analysis, we find no hint for exceptional properties caused by one dimensionality as is currently discussed in the context of photoemission measurements. The genuine dependence of the plasmon modes on the propagation angle relative to the one-dimensional axis is masked by interband transitions lying at about the same energy as the plasmon excitations itself.

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“…Electron loss measurements [4] on (SN), yielded an anisotropic plasmon energy which deviated significantly from (I), but in fact was quantitatively explained by a simple 3D model with an effective mass ratio nzl/rnll = 1.9. Furthermore, the agreement between theory and experiment for the plasmon dispersion supports the conclusion that the (SN), electronic structure is three-dimensional in character, so that the unusually anisotropic conductivity may be dominated by the fiber arrangement of the polymer chains.…”

Section: Introductionmentioning

confidence: 76%

Exchange Contributions and Plasmon Spectra of One‐Dimensional Systems

Brosens¹,

Devreese²,

Kahn³

et al. 1982

Physica Status Solidi (b)

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(b), and J. RWALDS (b) The dynamical exchange decoupling method for including exchange in the dielectric function of the electron gas is applied to one-dimensional systems with a tight-binding energy band. Depending on the bandwidth and the position of the Fermi energy in the band, dynamical exchange effects are shown to have appreciable effects on the plasmon dispersion. For propagation of the plasmon along the strand axis, and in the long-wavelength limit, exchange effects drastically lower the slope of the plasmon dispersion. For non-parallel incidence, the exchange effects are less pronounced, and extended over a smaller wave vector region.Die dynamische Austauschentkopplungsmethode fur die Einbeziehung des Austauschs in die dielektrische Funktion des Elektronengases wird auf eindimensionale Systeme mit einem ,,tightbinding"-Energieband angewendet. Es wird gezeigt, daI3 abhjingig von der Breite der Binder und der Lage der Fermienergie im Band die dynamischen Austauscheffekte einen betrichtlichen Einflu13 auf die Plasmonendispersion haben. Fur die Ausbreitung eines Plasmons in Richtung der ,,Strand"-Achse und im Grenzfall lsnger Wellen erniedrigen die Austauscheffekte drastisch den h s t i e g der Plasmonendispersion. Fur nichtparallelen Einfall sind die Austauscheffekte geringer ausgepragt und uber einen kleineren Bereich des Wellenvektors ausgedehnt.

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Plasmon Dispersion and Anisotropy in Polymeric Sulfur Nitride,(SN)x

Cited by 53 publications

References 17 publications

Optical properties and plasmon dispersion in epitaxial (SN)_x by electron energy loss spectroscopy

Optical properties and plasmon dispersion in epitaxial (SN)_x by electron energy loss spectroscopy

Plasmon excitations in quasi-one-dimensionalK0.3MoO3

Exchange Contributions and Plasmon Spectra of One‐Dimensional Systems

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Plasmon Dispersion and Anisotropy in Polymeric Sulfur Nitride,(SN)x

Cited by 53 publications

References 17 publications

Optical properties and plasmon dispersion in epitaxial (SN)x by electron energy loss spectroscopy

Optical properties and plasmon dispersion in epitaxial (SN)x by electron energy loss spectroscopy

Plasmon excitations in quasi-one-dimensionalK0.3MoO3

Exchange Contributions and Plasmon Spectra of One‐Dimensional Systems

Contact Info

Product

Resources

About

Optical properties and plasmon dispersion in epitaxial (SN)_x by electron energy loss spectroscopy

Optical properties and plasmon dispersion in epitaxial (SN)_x by electron energy loss spectroscopy