c-axis superfluid response and quasiparticle conductivity in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} and Bi{sub 2}Sr{sub 2}CuO{sub 6+{delta}}

Josephson plasma resonance for underdoped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} and Bi{sub 2}Sr{sub 2}CuO{sub 6{delta}}have been measured by sweeping the microwave frequency continuously. The resonance enables one to determine the superfluid density and quasiparticle conductivity in the c-ax...

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Published inJournal of low temperature physics Vol. 117; no. 5-6
Main Authors Gaifullin, M.B., Matduda, Yuji, Chikumoto, N., Shimoyama, J., Kishio, K., Yoshizaki, R.
Format Journal Article
LanguageEnglish
Published United States 01.12.1999
Subjects
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
JOSEPHSON EFFECT
MATERIALS SCIENCE
QUASI PARTICLES
STRONTIUM OXIDES
SUPERCONDUCTIVITY
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Summary:Josephson plasma resonance for underdoped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} and Bi{sub 2}Sr{sub 2}CuO{sub 6{delta}}have been measured by sweeping the microwave frequency continuously. The resonance enables one to determine the superfluid density and quasiparticle conductivity in the c-axis accurately. They show that the superfluid response and the low energy excitations of the condensate in the c-axis of these materials are very different from those in the ordinary Josephson multilayer tunnel junctions. The Josephson coupling energy in single layer Bi{sub 2}Sr{sub 2}CuO{sub 6+{delta}}is more than 5,000 times smaller than is predicted in interlayer tunneling model.
ISSN:0022-2291
1573-7357
DOI:10.1023/A:1022532019819