Pressure-induced superconductivity in quantum spin-ladder compound Sr14-xCaxCu24O41+δ

N. Môri, T. Nakanishi, H. Takahashi, T. Nagata, M. Uehara, J. Akimitsu, N. Motoyama, H. Eisaki, S. Uchida

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Superconductivity in a spin-ladder system was discovered only under high pressure on the compound Sr14-xCaxCu24O41+δ having Cu2O3 ladder-layer with x from 11.5 to 13.6. Superconducting transition temperature (Tc) was found to appear suddenly under high pressure. For the single crystalline sample with x = 11.5 the Tc has a maximum temperature of about 9.5 K at around 4 GPa and decreases with pressure above it. A substantial decrease of resistivity along the a-axis was revealed by applying pressure. This result suggests that the superconductivity occurs just after the crossover from one-to two-dimensional properties takes place.

Original languageEnglish
Pages (from-to)137-140
Number of pages4
JournalPhysica B: Condensed Matter
Volume239
Issue number1-2
DOIs
Publication statusPublished - Aug 1 1997
Externally publishedYes

Keywords

  • Cuprate
  • High pressure
  • Spin-ladder compound
  • Superconductivity

ASJC Scopus subject areas

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

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