Femtosecond Spectroscopy Studies on YBa2Cu3O7-x and PrBa2Cu3O7-x Epitaxial Thin Films

Chin. Phys. Lett.

1993, Vol. 10

Issue (12): 756-758 DOI:

Original Articles

Femtosecond Spectroscopy Studies on YBa₂Cu₃O_7-x and PrBa₂Cu₃O_7-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

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ZENG Wensheng, LIN Weizhu, ZHU Derui et al 1993 Chin. Phys. Lett. 10 756-758

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Abstract We report the results of femtosecond spectroscopy studies on YBa₂Cu₃O_7-x (x=0.1, 0.4, 0.8) and PrBa₂Cu₃O_7-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 YBa₂Cu₃O_7-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 T_c superconductors decrease of carrier concentration slows down the carrier-phonon coupling.

Keywords: 74.30.Ek 78.47.+p

Published: 01 December 1993

PACS:	74.30.Ek
	78.47.+p

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1993/V10/I12/0756

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	ZENG Wensheng
	LIN Weizhu
	ZHU Derui
	PI Feipeng
	XU Geng
	MO Dang
	XIA Zongju
	ZOU Yinghua
	WANG Jingjing
	YUAN Ping
	XIONG Guangcheng
	GAN Zizhao

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