Dependence of upper critical field and pairing strength on doping in cuprates

Yayu Wang, S. Ono, Y. Onose, G. Gu, Yoichi Ando, Y. Tokura, S. Uchida, N. P. Ong

研究成果: Article査読

169 被引用数 (Scopus)

抄録

We have determined the upper critical field Hc2 as a function of hole concentration in bismuth-based cuprates by measuring the voltage induced by vortex flow in a driving temperature gradient (the Nernst effect), in magnetic fields up to 45 tesla. We found that Hc2 decreased steeply as doping increased, in both single and bilayer cuprates. This relationship implies that the Cooper pairing potential displays a trend opposite to that of the superfluid density versus doping. The coherence length of the pairs ξo closely tracks the gap measured by photoemission. We discuss implications for understanding the doping dependence of the critical temperature Tco.

本文言語English
ページ(範囲)86-89
ページ数4
ジャーナルScience
299
5603
DOI
出版ステータスPublished - 2003 1 3
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ASJC Scopus subject areas

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