Superconducting gap and pseudogap in Bi2Sr2Ca2Cu3O 10+δ by short-pulse interlayer tunneling spectroscopy

Yoshiharu Yamada, Kenkichi Anagawa, Takenori Fujii, Takao Watanabe, Azusa Matsuda, Takasada Shibauchi, Minoru Suzuki

Research output: Contribution to journalConference article

Abstract

We have measured the superconducting gap, pseudogap and their doping dependence of CuO2 trilayer high-Tc superconductor Bi2Sr2Ca2Cu3O10+δ by short-pulse interlayer tunneling spectroscopy. While both gaps exhibit temperature dependence similar to those for the bilayer system, their doping dependence behaves differently from that of Tc, presenting an anomalous relationship between Tc and the gap magnitude. In the overdoped region, Tc remains almost unchanged from its optimum value irrespective of doping, while the gap decreases with increasing doping. This is suggestive of inequivalent hole doping in the inner and outer planes, which is thought to occur in trilayer systems.

Original languageEnglish
Pages (from-to)285-286
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume388-389
DOIs
Publication statusPublished - 2003 May 1
Externally publishedYes
Eventproceedings of the 23rd international conference on low temper - Hiroshima, Japan
Duration: 2002 Aug 202002 Aug 27

Keywords

  • Bi-2223
  • Doping dependence
  • Interlayer tunneling spectroscopy
  • Pseudogap
  • Superconducting gap

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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