Interlayer Josephson couplings in Hg-based multi-layered cuprates

Hirata, Yasuyuki*; Kojima, Kenji*; Uchida, Shinichi*; Ishikado, Motoyuki; Iyo, Akira*; Eisaki, Hiroshi*; Tajima, Setsuko*

Infrared reflectivity spectra of the multilayered HgBa $_{2}$ Ca $_{n-1}$ Cu $_{n}$ O $_{2n+2+delta}$ ( = 2, 3, 4, and 5) are measured. Optical plasma modes associated with the Josephson coupling between CuO $_{2}$ planes within a multilayer appear below $_{rm c}$ in the c-axis component of the reflectivity spectrum. For the bilayer and trilayer compound an optical Josephson plasma mode appears at unprecedentedly high frequency, 700-800 cm $^{-1}$ , below $_{rm c}$ . The plasma frequencies appreciably decrease in four- and five-layer compounds which indicates the suppression of superconducting order in the inner CuO $_{2}$ planes, consistent with the result of NMR experiment.

Language	:	English
Journal	:	Physica C
Volume	:	470
Number	:	Suppl.1
Pages	:	p.S44 - S46
Publication Year/Month	:	2010/12
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Paper URL	:	https://doi.org/10.1016/j.physc.2009.10.120
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Keywords	:	no keyword
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Registration No. : AA20101017
JAEA Abstracts No. :
Paper Submission No. : 9981

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