| Raman Scattering Study of (Sr,Ca)10Cu17O29 Single Crystals |
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J. Strzeszewskia, H. Szymczakb, L. Leonyukc and R. Szymczakb aFaculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-661 Warsaw, Poland bInstitute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland cGeological Department, Moscow State University, 119899 Moscow, Russia |
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| Received: September 4, 2000 |
| Polarized Raman spectra of high temperature superconducting single crystals of A10Cu17O29 (A10=Ca4.7Sr4.1Bi0.3) were studied in various scattering configurations in the range of 40-700cm-1. In very distinctive spectra there were found over 20 peaks. It was observed that the flat continuum of electronic excitations in the normal state was redistributed below the critical temperature. The frequency dependent redistribution is consistent with the value of energy gap estimated using tunnelling spectroscopy techniques. |
| DOI: 10.12693/APhysPolA.98.429 PACS numbers: 78.30.Hv, 74.25.Gz, 74.25.-q |