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FAR INFRARED REFLECTION MEASUREMENT OF THE ENERGY GAP OF YBa2Cu3O9-δ |
| YE Hongjuan;LU Wei;YU Zhiyi;SHEN Xuechu(S.C.Shen);MIAO Baicai*;CAI Yiming*;QIAN Yongjia* |
| Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Academia Sinica, Shanghai
*Physics Department, Fudan University, Shanghai |
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| Cite this article: |
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YE Hongjuan, LU Wei, YU Zhiyi et al 1988 Chin. Phys. Lett. 5 161-164 |
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Abstract The superconducting energy gap of YBa2Cu3O9-δ(Tc=90K) has been measured by means of far infrared reflection spectra. The value of 2Δ /kTc is between 2.2 and 3.4. According to the analysis of the dielectric function derived from K-K relations, we suggest that the energy gap value would be less than 18.8meV( 150cm-1). The temperature dependence of the energy gap Δ(T) is also obtained.
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Published: 01 April 1988
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