Plasmon effects in a layered two-dimensional electron gas
- Drexel Univ., Philadelphia, PA (United States). Dept. of Physics and Atmospheric Science
- Univ. de Liege (Belgium). Inst. de Physique
- Southern Univ., Baton Rouge, LA (United States). Dept. of Physics
This paper presents a study of the multilayered high-{Tc} cuprate superconductors based on a model where the plasmon mediated effective interaction provides an attraction between the charge carriers. In section 2 the authors present their model and calculate analytic expressions for the effective interaction between the charge carriers in the CuO layers. They then calculate the critical temperature {Tc} and show how it can provide an explanation for the rise in {Tc}, with a saturation effect, with the increase in the number of CuO layers per cell, as is observed in the thallium and bismuth based compounds. In section 3, their model is used to calculate the loss function, which is then utilized to interpret the infrared absorption spectra of La{sub 1.85}Sr{sub 0.15}CuO{sub 4} and the electron energy loss spectra of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}. These compounds provide good spectra as well as good sets of physical parameters. Section 4, presents a calculation of the frequency and temperature dependence of the plasmon contribution to the real and imaginary parts of the self-energy of the charge carriers in a layered electron gas, which gives results similar to the ones suggested in the phenomenological marginal Fermi liquid theory.
- OSTI ID:
- 82832
- Report Number(s):
- CONF-940142--; ISBN 0-8194-1452-2
- Country of Publication:
- United States
- Language:
- English
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