Two kinds of pseudogaps in Bi1.79Pb0.37Sr 1.86CuO6+δ studied by the out-of-plane resistivity in magnetic fields

Kazutaka Kudo, Yoshiyuki Miyoshi, Takahiko Sasaki, Terukazu Nishizaki, Norio Kobayashi

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Abstract

We report the out-of-plane resistivity of Bi1.79Pb 0.37Sr1.86CuO6+δ single crystals with various doping levels in magnetic fields up to 15 T parallel to the c-axis. By using the low-Tc system sensitive to magnetic fields, two kinds of pseudogaps PG1 and PG2 are found at T1* and T 2* below which the nonmetallic resistivity starts to develop and to be suppressed in magnetic fields with decreasing temperature, respectively. The doping dependence of T2* exhibits a dome-like shape similar to Tc, indicating the close relation between PG2 and the superconductivity, while T1* decreases monotonically with increasing the doping level. Systematic hole-doping reveals that T 1* exists even in the heavily overdoped nonsuperconducting sample, indicating the weak relation between PG1 and the superconductivity.

Original languageEnglish
Article number124710
Journaljournal of the physical society of japan
Volume75
Issue number12
DOIs
Publication statusPublished - Dec 1 2006

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Keywords

  • Modulation free
  • Out-of-plane resistivity
  • Pb-doped Bi2201
  • Pseudogap
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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