Temperature and doping dependence of the Bi2.1Sr1.9CaCu2O8+δ pseudogap and superconducting gap

Azusa Matsuda, Satoshi Sugita, Takao Watanabe

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)


The temperature and doping dependence of Bi2.1Sr1.9CaCu2O8+δ vacuum tunneling spectra was measured. The tunneling spectra show a clear gaplike feature for almost all the measured temperatures (10–300 K) and doping levels [overdoped (Tc 80 K) to underdoped (Tc 80 K), via optimum-doped (Tc 90 K)]. The superconducting gap structure below Tc develops into a pseudogap above Tc. The model analysis based on the BCS-type density of states showed a sudden increase in the gap value and inelastic scattering rate at Tc.

Original languageEnglish
Pages (from-to)1377-1381
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
Publication statusPublished - 1999 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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