Infrared synchrotron-radiation transmission measurements on YBa2Cu3O7- in the gap and supercurrent regions

G. P. Williams*, R. C. Budhani, C. J. Hirschmugl, G. L. Carr, S. Perkowitz, B. Lou, T. R. Yang

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

23 引文 斯高帕斯(Scopus)

摘要

We report infrared synchrotron-radiation transmission measurements on 1-m-thick films of high-Tc YBa2Cu3O7- from 40 to 290 cm-1 (5 to 36 meV). The films were deposited onto MgO substrates and showed resistive superconducting transitions with an onset at 83 K. Spectra below Tc show superconducting behavior, including the characteristic 1/ supercurrent dependence for frequencies below 100 cm-1. The entire spectrum can be fit when a Mattis-Bardeen-type conductivity is included identifying increasing absorption beginning at a photon energy of 23 meV. However, a substantial residual absorption persists to the lowest measured frequencies. In addition, the appearance of phonons, some attributable to c-axis vibrations, suggests we are sampling a mixture of both a-bplane and c-axis properties.

原文英語
頁(從 - 到)4752-4755
頁數4
期刊Physical Review B
41
發行號7
DOIs
出版狀態已發佈 - 1990

ASJC Scopus subject areas

  • 凝聚態物理學

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