Superconductivity in quantum spin-ladder compound Ca13.6Sr0.4Cu24O41+δ at high pressure

H. Takahashi, N. Môri, T. Nakanishi, T. Nagata, M. Uehara, J. Akimitsu, K. Kinoshita

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Superconductivity has been observed in a spin-ladder compound Ca13.6Sr0.4Cu24O41+δ having Cu2O3 ladder layer. Electrical resistivity measurements show that TC appears at 7 K at 1.5 GPa and disappears above 6 GPa after having the maximum TC of 12 K at 3 GPa. The bulk superconductivity was suggested in this system from AC susceptibility measurements, the volume fraction of which was estimated to be about 5% at 4.2 K at 3.5 GPa. In contrast with the oxide superconductor having CuO2-layer, this system shows superconductivity in the very narrow pressure range.

Original languageEnglish
Pages (from-to)112-114
Number of pages3
JournalPhysica B: Condensed Matter
Volume237-238
DOIs
Publication statusPublished - Jul 1997
Externally publishedYes

Keywords

  • Cuprate
  • High pressure
  • Ladder compounds
  • Superconductivity

ASJC Scopus subject areas

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

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