Temperature dependence of infrared spectral properties of the dimerized quasi 1-d TCNQ salts

Yartsev, V. M.; Graja, A.

doi:10.1051/jphys:01987004804061100

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…In solid state science, there are a number of techniques for probing detailed characteristics related to the structural and dynamical properties of materials, which are therefore capable of numerical prediction of electron-phonon coupling constants from experimental data. In particular, methods of vibrational spectroscopy have been shown to yield reliable estimates of several fundamental microscopic parameters, including relevant constants of electron-phonon interactions (e.g., [1][2][3][4][5] and references therein).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the electron–TO–phonon interaction in polar crystals from experimental data

Pishtshev

2010

Physica B: Condensed Matter

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The aim of this study was to determine the strengths of the coupling of electrons with the polar longwavelength transverse optical (TO) vibrations from infrared spectroscopy data. This determination is made by means of a simple relationship between the electron-TO-phonon interaction constant and material parameters, based on a parametrization of the electron-TO-phonon coupling in terms of the long-range dipole-dipole interaction. The combination of experimental data employed here allowed us to calculate directly the relevant constants for a number of representative polar insulators and to show that in ferroelectrics the interband electron-TO-phonon interaction at the Γ point is essentially strong. In these calculations, infrared spectroscopy methods proved to be an effective tool for study of the main properties of electron interaction with polar long-wavelength TO phonons.

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Section: Introductionmentioning

confidence: 99%

“…In particular, methods of vibrational spectroscopy have been shown to yield reliable estimates of several fundamental microscopic parameters, including relevant constants of electron-phonon interactions (e.g., [1][2][3][4][5] and references therein).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the electron–TO–phonon interaction in polar crystals from experimental data

Pishtshev

2010

Physica B: Condensed Matter

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Electron‐molecular vibration coupling in the cation‐radical salt of a giant analogue of TTF with ClO anion

Graja¹,

Yartsev²,

Garrigou‐Lagrange³

et al. 1992

Physica Status Solidi (b)

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A. GRAJA (a), v. M. YARTSEV4) (a, b), c. GARRIGOWLAGRANGE (b):Spectral studies of an ion-radical salt D-ClO, of a giant analogue (D) of TTF are performed in which the dihydro-TTF core is bearing the two conjugated 1,4-dithiafulvalen-6-yl side arms. Both IR absorption and electronic spectra of the donor molecule are measured; Raman scattering is also accomplished. Our main attention is paid to the electron-molecular vibration coupling in the D-C10, salt. It is shown that the idea of treating the donor molecules as an aggregate of two parts excited by the intramolecular charge transfer is an acceptable first approximation of the EMV coupling in the giant n-donor. The EMV coupling constants are calculated and compared with those determined for the parent TTF molecule.Les etudes spectroscopiques du sel d'ion radical D-C10, d'un analogue geant (D) du TTF sont realises dam lequel le coeur dihydro-TTF porte deux substituants 1,4-dithiafulven-6-y1 conjuguCs. Les absorptions IR et les spectres electroniques du donneur sont enregistres de mime que ceux de diffusion Raman. Plus particulitrement les couplages Clectron-vibration moleculaire (EMV) dans Ie sel D-CIO, sont 8tudiCs. On montre que I'hypothkse de concevoir la molecule de donneur comme resultant de la somme de deux parties excitkes par transfert de charge intramoleculaire constitue une bonne premiere approximation du couplage EMV dans le donneur gkant. Les constantes de couplage EMV sont calculees et comparees avec celles determinees dans la molecule parene de TTF.' ) Ul.

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New aspects of the infrared study of electron-phonon coupling

Yartsev

Graja

1988

Synthetic Metals

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Temperature dependence of infrared spectral properties of the dimerized quasi 1-d TCNQ salts

Cited by 5 publications

References 12 publications

Evaluation of the electron–TO–phonon interaction in polar crystals from experimental data

Evaluation of the electron–TO–phonon interaction in polar crystals from experimental data

Electron‐molecular vibration coupling in the cation‐radical salt of a giant analogue of TTF with ClO anion

New aspects of the infrared study of electron-phonon coupling

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