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

P. Calvani, M. Ortolani, S. Lupi, U. Schade, A. Perla, M. Fujita, K. Yamada

研究成果: Article査読

抄録

The reflectivity R(ω) 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.

本文言語English
ページ(範囲)7-12
ページ数6
ジャーナルInfrared Physics and Technology
49
1-2
DOI
出版ステータスPublished - 2006 9

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 凝縮系物理学

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