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

Takao Watanabe, Takenori Fujii, Azusa Matsuda

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95 Citations (Scopus)

Abstract

We find in the Bi2Sr2CaCu2O8+δ system that the characteristic temperatures T*χ (below which the uniform susceptibilities χab(T) (H ⊥ c) and χc(T) (H ‖ c) decrease) and T*ρc (below which the out-of-plane resistivity ρc(T) shows typical upturn) coincidence for all doping levels. We attribute the T dependence of χ’s and ρc to the anomalous (pseudogapped) density-of-states (DOS) in high-Tc cuprates. Furthermore, the anisotropy in the T dependence of χ’s is universal, i.e., χc ∝ 1.6χab, showing that there is only a single T-dependent component in the χ’s. This implies that the Curie-like behavior (dχ/dT) 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
DOIs
Publication statusPublished - 2000 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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