Femtosecond Spectroscopy Studies on YBa 2 Cu 3 O 7- x and PrBa 2 Cu 3 O 7- x Epitaxial Thin Films

Autor:	G.C. Xiong, Jing Jing Wang, Geng Xu, Fei-Peng Pi, Zongju Xia, Wen-Sheng Zeng, Weizhu Lin, Yinghua Zou, Dang Mo, Ping Yuan, Derui Zhu, Zizhao Gan
Rok vydání:	1993
Předmět:	Superconductivity Materials science Nuclear magnetic resonance Epitaxial thin film Relaxation (NMR) Analytical chemistry General Physics and Astronomy Reflectivity Femtochemistry
Zdroj:	Chinese Physics Letters. 10:756-758
ISSN:	1741-3540 0256-307X
DOI:	10.1088/0256-307x/10/12/015
Popis:	We report the results of femtosecond spectroscopy studies on YBa2Cu3O7-x (x=0.1, 0.4, 0.8) and PrBa2Cu3O7-x (x=0.1) 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 YBa2Cu3O7-x increase from less than 100 fs to more than 1 ps 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::25f07b6ca0f98e6b208c8aa446f9f303 https://doi.org/10.1088/0256-307x/10/12/015 Zobrazit plný text záznamu