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Broken time-reversal symmetry in cubic skutterudite-like superconductor Y$_3$Ru$_4$Ge$_{13}$
- Source :
- Phys. Rev. B 108, 214512 (2023)
- Publication Year :
- 2023
-
Abstract
- The microscopic properties of superconducting cubic skutterudite-like material Y$_3$Ru$_4$Ge$_{13}$ are investigated using muon spin relaxation and rotation ($\mu$SR) measurements. Zero-field $\mu$SR measurements reveal the presence of a spontaneous internal field with a magnitude of $\approx$ 0.18~mT below the superconducting transition temperature, indicating broken time-reversal symmetry in the ground state. In line with previous experiments, transverse-field $\mu$SR measurements are consistent with a fully developed superconductivity gap in Y$_3$Ru$_4$Ge$_{13}$. Our observations point towards the relevance of electronic correlations beyond electron-phonon coupling as origin and indicate that spin-orbit coupling is likely not the key driving force behind the spontaneous breaking of time-reversal symmetry in this system.<br />Comment: 7 pages, 3 figures
- Subjects :
- Condensed Matter - Superconductivity
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 108, 214512 (2023)
- Publication Type :
- Report
- Accession number :
- edsarx.2308.15064
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.108.214512