2018/02/28 by Joshua Robbins, James F. Annett, Martin Gradhand · 1 citation
Chemistry · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Angular momentum #Chemistry #Condensed matter physics #Cooper pair #Geometry #Lattice (music) #Magnetic field #Magnetic moment #Magnetization #Mathematics #Operator (biology) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Symmetry (geometry) #Theoretical physics #Topological Materials and Phenomena #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.101.134505
published as Phys. Rev. B 101, 134505 (2020)
arxiv created 2018/02/28 · openalex created_date 2018/03/06 · openalex publication_date 2020/04/10 · arxiv updated 2020/04/15 · openalex updated_date 2026/08/05
The chiral p-wave superconducting state is comprised of spin-triplet Cooper pairs carrying a finite orbital angular momentum. For the case of a periodic lattice, calculating the net magnetization arising from this orbital component presents a challenge as the circulation operator \stackrel\ifmmode \else \\fir\ifmmode×\else\texttimes\fi\stackrel\ifmmode \else \\fip is not well defined in the Bloch representation. This difficulty has been overcome in the normal state, for which a modern theory is firmly established. Here, we derive the extension of this normal-state approach, generating a theory which is valid for a general superconducting state, and go on to perform model calculations for a chiral p-wave state in Sr2RuO4. The results suggest that the magnitude of the elusive edge current in Sr2RuO4 is finite, but lies below experimental resolution. This provides a possible solution to the longstanding controversy concerning the gap symmetry of the superconducting state in this material.