Evidence for Spontaneous Magnetic Fields in Sr2RuO4 Supporting Multicomponent Superconductivity
Published:Dec 31, 2025 03:23
•1 min read
•ArXiv
Analysis
This paper provides experimental evidence, using muon spin relaxation measurements, that spontaneous magnetic fields appear in the broken time reversal symmetry (BTRS) superconducting state of Sr2RuO4 around non-magnetic inhomogeneities. This observation supports the theoretical prediction for multicomponent BTRS superconductivity and is significant because it's the first experimental demonstration of this phenomenon in any BTRS superconductor. The findings are crucial for understanding the relationship between the superconducting order parameter, the BTRS transition, and crystal structure inhomogeneities.
Key Takeaways
Reference
“The study allowed us to conclude that spontaneous fields in the BTRS superconducting state of Sr2RuO4 appear around non-magnetic inhomogeneities and, at the same time, decrease with the suppression of Tc.”