2019/07/31 by Satoshi Kashiwaya, Kohta Saitoh, Hiromi Kashiwaya +7
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electronic and Structural Properties of Oxides #Physics #Point reflection #Quantum mechanics #Superconductivity #Symmetry breaking #T-symmetry #Topological Materials and Phenomena #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.100.094530
published as Phys. Rev. B 100, 094530 (2019) · 10 pages 6 figures
openalex created_date 2019/07/23 · openalex publication_date 2019/09/25 · arxiv created 2019/09/26 · arxiv updated 2019/10/02 · openalex updated_date 2026/08/06
Sr2RuO4 is one of the most promising candidates of a topological superconductor with broken time-reversal symmetry because a number of experiments have revealed evidence for a spin-triplet chiral p-wave superconductivity. To clarify the time-reversal symmetry of Sr2RuO4, we introduce a test that examines the invariance of the Josephson critical current under the inversion of both the current and magnetic fields, in contrast to the detection of a spontaneous magnetic field employed in past experiments. Analyses of the transport properties of the planar and corner Josephson junctions formed between Sr2RuO4 and Nb reveal the time-reversal invariant superconductivity, most probably helical p-wave symmetry, of Sr2RuO4. This state corresponds to a yet-to-be confirmed topological crystalline superconductivity that can host two Majorana edge modes at the surface protected by crystalline mirror symmetry.