Ghosh, Haranath and Sardar, Manas (1997) Raman continuum in bilayer cuprate superconductors. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 288 (1-2). pp. 121-126. ISSN 0921-4534
Full text not available from this repository.Abstract
Experimentally the Raman continuum in the superconducting state of high T-c materials for the A(g) and B-g geometry of scattering exhibits peaks far separated from each other (about 80 to 150 cm(-1)) in frequency. The former insensitive to doping variations over a small range near the optimal doping concentrations, where the T-c does not vary much, whereas the latter shifts towards higher frequencies for lesser hole concentrations. It is also observed that the peak position for the A(g) continuum is very temperature sensitive, whereas the peak position of the B-g geometry scattered intensity is only weakly dependent on temperature. We calculate the electronic Raman scattering intensities using the ''modified spin bag model'', and show that it offers a natural and quantitative explanation for the anomalous peak separation and their peculiar sensitivity to doping variations as well as to temperature. (C) 1997 Elsevier Science B.V.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SINGLE-CRYSTAL YBA2CU3O7-DELTA; HIGH-TC SUPERCONDUCTIVITY; GAP ANISOTROPY; SPIN FLUCTUATIONS; ORDER-PARAMETER; TEMPERATURE-DEPENDENCE; LIGHT-SCATTERING; BAG MECHANISM; ENERGY-GAP; BI2SR2CACU2O8+DELTA |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Mar 2023 09:13 |
| Last Modified: | 30 Mar 2023 09:13 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50643 |
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