Zn doping effect on the superconducting gap in YBa2Cu3O7-Φ: Raman study
Zn doping effect on the superconducting gap in YBa2Cu3O7-Φ: Raman study
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Zn 掺杂对 YBa2Cu3O7-Φ 超导能隙的影响：拉曼研究
DOI：
10.1103/physrevb.65.024515
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发表时间：
2001
影响因子：
3.7
通讯作者：
A. Yamanaka
中科院分区：
文献类型：
--
作者：
M. Limonov;D. Shantsev;S. Tajima;A. Yamanaka
无孪晶YBa 2（Cu 1 x Zn x）3 O 7的拉曼散射光谱。在300 ~ 10 K温度范围内，研究了具有最佳氧含量（Tc = 93 K，x = 0）的δ单晶体在YY和X 'Y'偏振下的生长。低于Tc，我们发现了一个低的频率偏移的间隙相关的峰与Zn掺杂的电子响应，伴随着加宽。声子重整化效应的变化与电子响应的变化是一致的。所有观察到的Zn掺杂效应都可以用d波超导体在幺正性极限下的理论模型来粗略描述。
The Raman scattering spectra of twin-free YBa 2 (Cu 1 x Zn x ) 3 O 7 . δ single crystals with an optimal oxygen content (T c = 93 K at x = 0) have been investigated in a temperature range from 300 to 10 K in YY and X'Y' polarizations. Below T c , we found a low-frequency shift of the gap-related peak in the electronic response with Zn doping, accompanied by broadening. The changes in the phonon renormalization effects are consistent with the change in the electronic response. All the observed Zn-doping effects can be roughly described in the theoretical model for a d-wave superconductor in a unitarity limit.