Effect of high pressure on raman spectra of T1-based superconducting crystals |
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| Authors: | L. V. Gasparov O. V. Misochko M. I. Eremets A. V. Lomsadze V. V. Struzhkin |
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| Affiliation: | 1. Institute of Solid State Physics Academy of Sciences Chernogolovka , USSR, Moscow district, 142432;2. Institute of High Pressure Physics , Academy of Sciences Troitsk , USSR, moscow district, 142092 |
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| Abstract: | Abstract Raman spectra for two members of the high-Tc superconductor family T1m Ba2 Ca2 cuo6+m were measured at pressure up to 3 0 GPa. It is shown that pressure induces nonuniform deformation of the unit cell. Analysis of Raman shifts indicates the applicability of a Gruneisen model for these high-Tc superconductors. As evidenced by the absence of changes of the Raman spectra, no phase transitions occur in the pressure range studied. |
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