Optical Constants of Crystalline Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ by Brillouin Light Scattering Spectroscopy
| Autor: | J. P. F. LeBlanc, G. T. Andrews, B. D. E. McNiven |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter - Materials Science
Materials science Condensed Matter - Superconductivity Metals and Alloys Physics::Optics 02 engineering and technology Light-Scattering Spectroscopy 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Molecular physics 3. Good health Brillouin zone Condensed Matter::Materials Science 0103 physical sciences Materials Chemistry Ceramics and Composites Electrical and Electronic Engineering 010306 general physics 0210 nano-technology |
| Popis: | Room-temperature optical constants of crystalline Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ were determined using data extracted from Brillouin light scattering spectra. Optical extinction coefficient-to-refractive index ratios at a wavelength of 532 nm were obtained from bulk phonon peak linewidth and frequency shift measurements and range from $0.19 \leq 2\kappa/n \leq 0.29$ for directions close to the crystallographic $c$-axis. These ratios, and optical extinction coefficients, absorption coefficients, and imaginary parts of the dielectric function determined from these ratios and known refractive index, are in general agreement with values found in optical reflectance studies, but are 5-7 times larger than those extracted from optical interference measurements. Comment: 6 pages, 2 figures |
| Databáze: | OpenAIRE |
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