Sign reversal of the oxygen isotope effect on Tc in Sr2RuO4

Z. Q. Mao, Y. Maeno, Y. Mori, S. Sakita, S. Nimori, M. Udagawa

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We investigated the oxygen isotope effect (IE) on the transition temperature Tc in the spin-triplet superconductor Sr2RuO4 (with the intrinsic Tc0=1.5 K). A clear IE shift in Tc was observed. Moreover, we found that the IE coefficient alpha exhibits an unusual variation with Tc. For lower-Tc crystals containing impurities and defects, α is positive and increases with decreasing Tc; α(Tc) is described well by the universal behavior expected theoretically. However, for crystals with Tc approaching Tc0, α deviates from the universal α(Tc) and becomes negative. We discuss its possible mechanism on the basis of existing models.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number14
StatePublished - Mar 20 2001

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


Dive into the research topics of 'Sign reversal of the oxygen isotope effect on Tc in Sr2RuO4'. Together they form a unique fingerprint.

Cite this