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Raman scattering from collision-dominated plasmons in YBCO

✍ Scribed by Sudhanshu S. Jha; M.R. Press

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
209 KB
Volume
185-189
Category
Article
ISSN
0921-4534

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✦ Synopsis

To investigate the problem of the 'flat continuum' in the normal state Raman scattering from single crystals of YBa2Cu307 (YBCO), the value of the intraband Raman crosssection from possible plasmon excitations in the crystal has been obtained and compared with the Raman crosssection for the unscreened part of the single-particle electronic excitations. It is found that only in the highly collision-dominated regime, it is possible to obtain closeto-flat continuum, as a contribution from heavily damped plasmon excitations in the system involving extrem~ jr large values of the normal state collision frequency Wc(W).

πŸ“œ SIMILAR VOLUMES

Anomalous normal state electronic Raman
Anomalous normal state electronic Raman scattering continuum in YBCO: Inadequacy of frequency-dependent collision-rate models
✍ M.R. Press; Sudhanshu S. Jha πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 419 KB

We calculate the intraband electronic Raman scattering cross section from charge density fluctuations of holes in YBCO and the real part of the transverse electromagnetic conductivity in the normal state, using phenomenological linear frequency-dependent collision rates toe(to, T). Whereas there is