Strong increase of Tc of Sr2RuO4 under both tensile and compressive strain

Clifford W. Hicks*, Daniel O. Brodsky, Edward A. Yelland, Alexandra S. Gibbs, Jan A. N. Bruin, Mark E. Barber, Stephen D. Edkins, Keigo Nishimura, Shingo Yonezawa, Yoshiteru Maeno, Andrew P. Mackenzie

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

271 Citations (Scopus)

Abstract

A sensitive probe of unconventional order is its response to a symmetry-breaking field. To probe the proposed px ± ipy topological superconducting state of Sr2RuO4, we have constructed an apparatus capable of applying both compressive and tensile strains of up to 0.23%. Strains applied along ⟨100⟩ crystallographic directions yield a strong, strain-symmetric increase in the superconducting transition temperature Tc. ⟨110⟩ strains give a much weaker, mostly antisymmetric response. As well as advancing the understanding of the superconductivity of Sr2RuO4, our technique has potential applicability to a wide range of problems in solid-state physics.

Original languageEnglish
Pages (from-to)283-285
Number of pages3
JournalScience
Volume344
Issue number6181
DOIs
Publication statusPublished - 18 Apr 2014

Keywords

  • Upper-critical field
  • Unconventional superconductivity
  • Gap structure
  • Symmetry
  • Transition
  • Scattering
  • Anistropy
  • Model

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