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Superconductivity-type fluctuations in the electronic spectra of charge-transfer organic solids

Superconductivity-type fluctuations in the electronic spectra of charge-transfer organic solids The interaction between an excited electron and a large-radius exciton (Wannier-Mott exciton) has been studied in the visible and ultra-violet frequency regions for a two-level system of a molecular solid. Using a self-consistent approach, it is shown that at low temperatures and when certain conditions prevail, a bound-state may exist arising from the electron-exciton pairing. The excitation spectrum is found to be of the superconductivity type and the electron- exciton quasiparticle migrates through the crystal with definite energy and wave vector. The gap function due to the electron-exciton pairing is calculated at zero temperature and then the expression for the transition temperature is established. A formula for the ground-state energy is derived corresponding to the electron-exciton pairing and a discussion of the parameters that appear in the theory is presented. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Superconductivity-type fluctuations in the electronic spectra of charge-transfer organic solids

Journal of Low Temperature Physics , Volume 20 (4) – May 17, 2004

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References (15)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00117798
Publisher site
See Article on Publisher Site

Abstract

The interaction between an excited electron and a large-radius exciton (Wannier-Mott exciton) has been studied in the visible and ultra-violet frequency regions for a two-level system of a molecular solid. Using a self-consistent approach, it is shown that at low temperatures and when certain conditions prevail, a bound-state may exist arising from the electron-exciton pairing. The excitation spectrum is found to be of the superconductivity type and the electron- exciton quasiparticle migrates through the crystal with definite energy and wave vector. The gap function due to the electron-exciton pairing is calculated at zero temperature and then the expression for the transition temperature is established. A formula for the ground-state energy is derived corresponding to the electron-exciton pairing and a discussion of the parameters that appear in the theory is presented.

Journal

Journal of Low Temperature PhysicsSpringer Journals

Published: May 17, 2004

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