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Fluctuation effects and mass enhancement in high-Tc cuprate superconductors

S. Hirooka, T. Tanaka

DOI 10.1103/PhysRevB.41.11588 · Physical Review B

T1

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Abstract

Fluctuation effects of the superconducting order parameter in high-Tc cuprate superconductors are investigated in connection with the mass-enhancement effect on the phenomenological Ginzburg-Landau theory and the Gaussian fluctuation theory. Large fluctuations of the order parameter, originating in a large mass enhancement caused by strong electron correlation, play an essential role in the determination of Tc in high-Tc superconductors. It is shown that a simple linear relation between Tc and λ0−2 holds in the system with low doping, where λ0 is a magnetic penetration depth at T=0 K.

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FormulaReported Tc (K)Pressure (GPa)Type
La2CuO4

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—Pressure not reportedunknown

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