The sintered samples of Y-Ba-Cu-0 were quenched in air at different temperatures from 950 to 300℃ and their room-temperature far-infrared reflectance spectra were obtained.The spectra were studied by using the Drudc ...The sintered samples of Y-Ba-Cu-0 were quenched in air at different temperatures from 950 to 300℃ and their room-temperature far-infrared reflectance spectra were obtained.The spectra were studied by using the Drudc model and Lorcntzian phonon.From the curve of carrier density vs quench temperature,an orthorhombic-tetragonal phase change is indicated.The phonon oscillation strength changes were explained by the abnormal sensibility in the reflectance spectra.展开更多
The anomalous phonon properties in YBa_(2)Cu_(3)O_(7)-δ superconductor quenched from different temperatures were obtained by means of IR refiection spectroscopy.The analyses of the data suggest that polarons exist in...The anomalous phonon properties in YBa_(2)Cu_(3)O_(7)-δ superconductor quenched from different temperatures were obtained by means of IR refiection spectroscopy.The analyses of the data suggest that polarons exist in the system,and this may provide a cruicial clue to the mechanism study.展开更多
基金Supported by the National Natural Science Foundation of China。
文摘The sintered samples of Y-Ba-Cu-0 were quenched in air at different temperatures from 950 to 300℃ and their room-temperature far-infrared reflectance spectra were obtained.The spectra were studied by using the Drudc model and Lorcntzian phonon.From the curve of carrier density vs quench temperature,an orthorhombic-tetragonal phase change is indicated.The phonon oscillation strength changes were explained by the abnormal sensibility in the reflectance spectra.
基金This work was supported by the National Science Foundation of China.
文摘The anomalous phonon properties in YBa_(2)Cu_(3)O_(7)-δ superconductor quenched from different temperatures were obtained by means of IR refiection spectroscopy.The analyses of the data suggest that polarons exist in the system,and this may provide a cruicial clue to the mechanism study.