Femtosecond Spectroscopy Studies on YBa2 Cu3 O7-x and PrBa2 Cu3 O7-x Epitaxial Thin Films
ZENG Wensheng* , LIN Weizhu* , ZHU Derui* , PI Feipeng* , XU Geng* , MO Dang* , XIA Zongju, ZOU Yinghua, WANG Jingjing, YUAN Ping, XIONG Guangcheng, GAN Zizhao
* Department of Physics, Zhongshan University, Guangzhou 510275
Department of Physics and Mesoscopic Physics Laboratory, Peking University, Beijing 100871
Femtosecond Spectroscopy Studies on YBa2 Cu3 O7-x and PrBa2 Cu3 O7-x Epitaxial Thin Films
ZENG Wensheng* ;LIN Weizhu* ;ZHU Derui* ;PI Feipeng* ;XU Geng* ;MO Dang* ;XIA Zongju;ZOU Yinghua;WANG Jingjing;YUAN Ping;XIONG Guangcheng;GAN Zizhao
* Department of Physics, Zhongshan University, Guangzhou 510275
Department of Physics and Mesoscopic Physics Laboratory, Peking University, Beijing 100871
关键词 ：
74.30.Ek ,
78.47.+p
Abstract ： We report the results of femtosecond spectroscopy studies on YBa2 Cu3 O7-x (x=0.1, 0.4, 0.8) and PrBa2 Cu3 O7-x (x=0.l) epitaxial thin films at room temperature. The transient reflectivity signals ΔR(t) in the samples are consistent with a band filling model. The relaxation times of ΔR(t) in YBa2 Cu3 O7-x increase from less than 100 fs to more than 1ps with increasing x and with substitution of Pr for Y. These results reveal that in high Tc superconductors decrease of carrier concentration slows down the carrier-phonon coupling.
Key words ：
74.30.Ek
78.47.+p
出版日期: 1993-12-01
引用本文:
ZENG Wensheng*;LIN Weizhu*;ZHU Derui*;PI Feipeng*;XU Geng*;MO Dang*;XIA Zongju;ZOU Yinghua;WANG Jingjing;YUAN Ping;XIONG Guangcheng;GAN Zizhao. Femtosecond Spectroscopy Studies on YBa2 Cu3 O7-x and PrBa2 Cu3 O7-x Epitaxial Thin Films[J]. 中国物理快报, 1993, 10(12): 756-758.
2 Cu3 O7-x and PrBa2 Cu3 O7-x Epitaxial Thin Films. Chin. Phys. Lett., 1993, 10(12): 756-758.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y1993/V10/I12/756
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