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.
YE Hongjuan, LU Wei, YU Zhiyi, SHEN Xuechu(S.C.Shen), MIAO Baicai, CAI Yiming, QIAN Yongjia. FAR INFRARED REFLECTION MEASUREMENT OF THE ENERGY GAP OF YBa2Cu3O9-δ[J]. Chin. Phys. Lett., 1988, 5(4): 161-164.
YE Hongjuan, LU Wei, YU Zhiyi, SHEN Xuechu(S.C.Shen), MIAO Baicai, CAI Yiming, QIAN Yongjia. FAR INFRARED REFLECTION MEASUREMENT OF THE ENERGY GAP OF YBa2Cu3O9-δ[J]. Chin. Phys. Lett., 1988, 5(4): 161-164.
YE Hongjuan, LU Wei, YU Zhiyi, SHEN Xuechu(S.C.Shen), MIAO Baicai, CAI Yiming, QIAN Yongjia. FAR INFRARED REFLECTION MEASUREMENT OF THE ENERGY GAP OF YBa2Cu3O9-δ[J]. Chin. Phys. Lett., 1988, 5(4): 161-164.
YE Hongjuan, LU Wei, YU Zhiyi, SHEN Xuechu(S.C.Shen), MIAO Baicai, CAI Yiming, QIAN Yongjia. FAR INFRARED REFLECTION MEASUREMENT OF THE ENERGY GAP OF YBa2Cu3O9-δ[J]. Chin. Phys. Lett., 1988, 5(4): 161-164.