TY - JOUR
T1 - Preparation and picosecond optical response of Bi system high-Tc superconductors
AU - Tominari, Yukihiro
AU - Kiwa, Toshihiko
AU - Murakami, Hironaru
AU - Tonouchi, Masayoshi
AU - Arai, Takeshi
AU - Aomine, Takafumi
N1 - Funding Information:
T. Kiwa acknowledges the support in part by a Sasagawa Scientific Research grant from the Japan Science Society.
Funding Information:
This work was supported in part by a Grant-in-Aid for Scientific Research on Priority Area (A), no. 10142101 and a Grant-in-Aid for Scientific Research (B), no. 12450146, from the Ministry of Education, Culture, Sports, Science and Technology.
PY - 2002/2/15
Y1 - 2002/2/15
N2 - Bi2Sr2Ca1-xYxCu2 O8+δ single crystals were grown by traveling solvent floating zone method. The crystallinity and the superconducting property of the single crystals were characterized by X-ray diffraction and in-plane resistivity measurements. To investigate the ultrafast optical response, time-resolved pump-probe reflectivity measurements were carried out on the single crystals. As a result, fairly long relaxation times of about 20 and 6 ps of excited carriers were estimated for the crystals with x=0 and 0.2, respectively, as compared to 1.7 ps for YBa2Cu3O7-δ thin films in previous study. The relaxation time observed on the underdoped crystal with x=0.2 showed a good consistency with that of Bi2Sr2CaCu2O8+δ thin film in underdoped regime.
AB - Bi2Sr2Ca1-xYxCu2 O8+δ single crystals were grown by traveling solvent floating zone method. The crystallinity and the superconducting property of the single crystals were characterized by X-ray diffraction and in-plane resistivity measurements. To investigate the ultrafast optical response, time-resolved pump-probe reflectivity measurements were carried out on the single crystals. As a result, fairly long relaxation times of about 20 and 6 ps of excited carriers were estimated for the crystals with x=0 and 0.2, respectively, as compared to 1.7 ps for YBa2Cu3O7-δ thin films in previous study. The relaxation time observed on the underdoped crystal with x=0.2 showed a good consistency with that of Bi2Sr2CaCu2O8+δ thin film in underdoped regime.
KW - BSCCO
KW - Pump-probe spectroscopy
KW - Single crystal
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U2 - 10.1016/S0921-4534(01)01027-9
DO - 10.1016/S0921-4534(01)01027-9
M3 - Article
AN - SCOPUS:0037082786
SN - 0921-4534
VL - 367
SP - 332
EP - 336
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1-4
ER -