Pseudogap phase boundary in overdoped Bi2Sr2CaCu 2O8+δ studied by measuring out-of-plane resistivity under the magnetic fields

Kousuke Murata, Haruki Kushibiki, Takao Watanabe, Kazutaka Kudo, Terukazu Nishizaki, Norio Kobayashi, Kazuyoshi Yamada, Takashi Noji, Yoji Koike

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In order to elucidate the relationship between the pseudogap and high-Tc superconductivity, the characteristic pseudogap temperature T in Bi2Sr2CaCu2O8+δ system has been systematically evaluated as a function of doping, especially focusing on its overdoped region, by measuring the out-of-plane resistivity ρc. Overdoped samples have been prepared by annealing TSFZ-grown Bi2Sr2CaCu2O8+δ single crystals under the high oxygen pressures (990 kgf/cm2). At a zero field, the ρc showed a metallic behavior down to T c(=62K), while under the magnetic fields of over 3 T, ρc showed typical upturn behavior from around 65 K upon decreasing temperature. This result suggests that the pseudogap and superconductivity are different phenomena.

Original languageEnglish
Pages (from-to)S153-S154
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec 1

Keywords

  • BiSrCaCuO
  • Magnetoresistance
  • Out-of-plane resistivity
  • Pseudogap
  • Superconductive fluctuation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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