Pseudogap in Bi2Sr2CaCu2O8+δ studied by measuring anisotropic susceptibilities and out-of-plane transport

Takao Watanabe, Takenori Fujii, Azusa Matsuda

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Abstract

We find in the Bi2Sr2CaCu2O8+δ system that the characteristic temperatures TX* [below which the uniform susceptibilities Xab(T) (H⊥c) and Xc(T) (H || c) decrease] and T*pc [below which the out-of-plane resistivity pc(T) shows typical upturn] coincide for all doping levels. We attribute the T dependence of X's and pc to the anomalous (pseudogapped) density of states (DOS) in high-Tc cuprates. Furthermore, the anisotropy in the T dependence of X's is universal, i.e., Xc ∝ 1.6Xab, showing that there is only a single T-dependent component in the X's. This implies that the Curie-like behavior (dX/dT < 0) observed in overdoped samples is also caused by a DOS effect.

Original languageEnglish
Pages (from-to)5848-5851
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number25
Publication statusPublished - 2000 Jun 19
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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