High-Tc superconductor near the S-I transition

T. Kasai, H. Nakajima, T. Fujii, I. Terasaki, T. Watanabe, H. Shibata, A. Matsuda*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We report on the density of states measurements of Bi2212 (Bi2+xSrxCaCu2O8+δ) near the superconductivity-insulator transition using a low temperature scanning tunneling microscope. We prepared highly underdoped Bi rich Bi2212 single crystals (Tc ∼ 32 K). The energy gap distribution did not provide an energy scale proportional to Tc. Averaged tunnel spectra with various doping levels were scaled into a single line if energy was normalized by their respective gap values. This indicated there was no crossover energy, which separates a pseudogap and a superconducting gap.

Original languageEnglish
Pages (from-to)1016-1019
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number15-20
Publication statusPublished - 2009 Oct 15
Externally publishedYes


  • Bi2212
  • STM
  • Superconductor
  • Underdoped

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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