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Superconducting order parameter in heavily overdoped $Bi_2 Sr_2 Ca Cu_2 O_{8+δ}$: a global quantitative analysis

R. H. He·D. L. Feng·H. Eisaki·J. -i. Shimoyama·K. Kishio·G. D. Gu
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Abstract

A systematic analysis of the complex lineshape at $(π,0)$ of heavily overdoped Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ is presented. We show that a coherent component in the quasi-particle excitation is correlated with the superfluid density throughout the entire doping range and suggest it is a direct measure of the order parameter of high temperature superconductors.

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R. H. He, D. L. Feng, H. Eisaki, J. -i. Shimoyama, K. Kishio, G. D. Gu. 2004-08-10. Superconducting order parameter in heavily overdoped $Bi_2 Sr_2 Ca Cu_2 O_{8+δ}$: a global quantitative analysis. https://doi.org/10.1103/physrevb.69.220502

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