Persistence of the Superconducting Condensate Far above the Critical Temperature of YBa sub(2)(Cu, Zn) sub(3)O sub(y) Revealed by c-Axis Optical Conductivity Measurements for Several Zn Concentrations and Carrier Doping Levels

The superconductivity precursor phenomena in high temperature cuprate superconductors is studied by direct measurements of the superconducting condensate with the use of the c-axis optical conductivity of YBa sub(2)(Cu sub(1-x)Zn sub(x)) sub(3)O sub(y) for several doping levels (p) as well as for se...

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Bibliographic Details
Published in:Physical review letters 2014-03, Vol.112 (12)
Main Authors: Uykur, Ece, Tanaka, Kiyohisa, Masui, Takahiko, Miyasaka, Shigeki, Tajima, Setsuko
Format: Article
Language:English
Subjects:
Carriers
Condensates
COPPER OXIDE
Cuprates
Doping
ELECTRICAL CONDUCTIVITY
MEASUREMENT
Precursors
SUPERCONDUCTIVITY
SUPERCONDUCTORS
Transition temperature (superconductivity)
YTTRIUM OXIDE
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Summary:The superconductivity precursor phenomena in high temperature cuprate superconductors is studied by direct measurements of the superconducting condensate with the use of the c-axis optical conductivity of YBa sub(2)(Cu sub(1-x)Zn sub(x)) sub(3)O sub(y) for several doping levels (p) as well as for several Zn concentrations. Both the real and imaginary parts of the optical conductivity clearly show that the superconducting carriers persist up to the high temperatures T sub(p) that is higher than the critical temperature T sub(c) but lower than the pseudogap temperature T* T sub(p). increases with reducing doping level like T*, but decreases with Zn substitution unlike T*.
ISSN:0031-9007
1079-7114