Use of coherent synchrotron radiation in a study on cuprates exhibiting superconductivity and charge order

被引：0
|
作者：
Calvani, P.
Ortolani, M.
Lupi, S.
Schade, U.
Perla, A.
Fujita, M.
Yamada, K.
机构：
[1] Univ Roma La Sapienza, Coherentia INFM, I-00185 Rome, Italy
[2] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[3] Berliner Elektronenspeicherring Gesell Synchro, D-12489 Berlin, Germany
[4] Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9800821, Japan
来源：
INFRARED PHYSICS & TECHNOLOGY | 2006年 / 49卷 / 1-2期
关键词：
D O I：
10.1016/j.infrared.2006.01.006
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The reffectivity R(omega) of both the ab plane and the c axis of single crystals of La1.875Ba0.125-ySryCuO4, with 0.05 <= y < 0.125 has been measured down to 5 cm(-1), using coherent synchrotron radiation below 30 cm(-1). This extension to very low infrared frequencies allows one to detect far-infrared peaks (FIP) in the optical conductivity, which are related to charge ordering, and which can be hardly observed by using conventional sources. In the superconducting phase, one can also observe a Josephson plasma resonance in the c-axis reflectivity, and its shift with temperature. At higher frequencies, the effect of charge ordering is monitored through a depletion in the optical conductivity which extends up to 4000 cm(-1). (c) 2006 Elsevier B.V. All rights reserved.
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页码：7 / 12
页数：6
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