Characterization of Sr2RuO4 Josephson junctions made of epitaxial films

Abstract

We have studied fundamental properties of weak-link Sr2RuO4/Sr2RuO4 Josephson junctions fabricated by making a narrow constriction on superconducting Sr2RuO4 films through laser micro-patterning. The junctions show a typical overdamped behavior with much higher critical current density, compared with those previously reported for bulk Sr2RuO4/s-wave superconductor junctions. Observed magnetic field and temperature dependences of the Josephson critical current suggest that the chiral p-wave is unlikely for the superconducting symmetry, encouraging further theoretical calculations of the Sr2RuO4/Sr2RuO4 type junctions.

14 pages, 4 figures

References in corpus (10)

• High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
• Is Sr2RuO4 a Chiral P-Wave Superconductor?
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• Anomalous Transport through the p-Wave Superconducting Channel in the 3-K Phase of Sr2RuO4
• Molecular beam epitaxy growth of superconducting Sr2RuO4 films
• Theory of Josephson effect in unconventional superconducting junctions with diffusive barriers
• Theory of Josephson effect in chiral p-wave superconductor / diffusive normal metal / chiral p-wave superconductor junctions
• Anomalous Enhancement of Upper Critical Field in Sr2RuO4 Thin Films

Cited by in corpus (4)

• A Review of Electronic Transport in Superconducting Sr${}_2$RuO${}_4$ Junctions
• Ferromagnetic state with large magnetic moments realized in epitaxially strained Sr3Ru2O7 films
• Unconventional two-dimensional quantum oscillations in three-dimensional thick SrRuO${}_3$ films
• Josephson effects in the spin-triplet superconductor/altermagnet/spin-triplet superconductor junctions: the detection of the intrinsic $\mathbf{d}$-vector