2009/02/28 by Yasuhiro Tada, Norio Kawakami, N. Kawakami +1
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electronic and Structural Properties of Oxides #Frustration #Pairing #Parity (physics) #Physics #Point reflection #Quantum mechanics #Singlet state #Spin (aerodynamics) #Superconductivity #Symmetry (geometry) #T-symmetry #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1088/1367-2630/11/5/055070
Submitted to New. J. Phys. a focus issue on "Superconductors with Exotic Symmetries"; amended version as accepted for publication
arxiv created 2009/05/14 · openalex publication_date 2009/05/29 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate pairing states realized at the (001) interface of a spin-triplet superconductor Sr 2 RuO 4 on the basis of microscopic calculations. Because of a Rashba-type spin–orbit interaction induced at the interface, strong parity-mixing of Cooper pairs between a spin-singlet state and a spin-triplet state occurs in this system. There are also strong inter-band pair correlations between the spin–orbit split bands, in spite of the considerably large spin–orbit splitting. This is due to frustration between the spin–orbit interaction and pairing interactions. In this pairing state, time-reversal symmetry is restored, in contrast to the bulk Sr 2 RuO 4 , which is believed to be a chiral p+ip superconductor with broken time-reversal symmetry. It is demonstrated that, because of these features, the pairing state at the interface is a promising candidate for the recently proposed time-reversal invariant topological superconductor.