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Muon Knight Shift as a Precise Probe of the Superconducting Symmetry of Sr_{2}RuO_{4}.

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Updated: Jul 19, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
08:53

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Published on: October 9, 2012

Dynamical superconducting order parameter domains in Sr2RuO4.

Francoise Kidwingira1, J D Strand, D J Van Harlingen

  • 1Department of Physics, University of Illinois, Urbana, IL 61801, USA.

Science (New York, N.Y.)
|October 28, 2006
PubMed
Summary

This study provides direct evidence for chiral domain structures in strontium ruthenate (Sr2RuO4) superconductors. These domains confirm the complex, time-reversal-breaking nature of its p-wave superconducting state.

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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride

Published on: July 8, 2021

Area of Science:

  • Condensed Matter Physics
  • Superconductivity Research
  • Materials Science

Background:

  • Sr2RuO4 is a candidate for unconventional superconductivity.
  • Understanding its pairing symmetry is crucial for fundamental physics.
  • Previous studies suggested complex pairing but lacked direct evidence.

Purpose of the Study:

  • To provide direct evidence for the complex p-wave order parameter symmetry in Sr2RuO4.
  • To investigate the presence and nature of dynamical chiral order parameter domains.
  • To elucidate the role of these domains in the observed superconducting properties.

Main Methods:

  • Fabrication of Josephson junctions on orthogonal faces of Sr2RuO4 single crystals.
  • Measurement of critical current modulation by magnetic fields.
  • Analysis of telegraph noise and hysteresis in critical current measurements.

Main Results:

  • Direct evidence for chiral order parameter domains (px +/- ipy) was found.
  • Domain structure influences magnetic field modulation of critical current.
  • Domain wall motion and chiral state transitions generate telegraph noise and hysteresis.

Conclusions:

  • The observed phenomena confirm the p-wave triplet spin pairing state in Sr2RuO4.
  • The superconducting state is complex and breaks time-reversal symmetry.
  • Dynamical chiral domains are intrinsic to the superconducting properties of Sr2RuO4.