d+is vs d+id' Time Reversal Symmetry Breaking States in Finite Size Systems
arXiv:cond-mat/0205495 · doi:10.1103/PhysRevB.66.174515
Abstract
We report self-consistent quasiclassical calculations of spontaneous currents and magnetic moments in finite size unconventional superconducting systems, namely: (i) in isolated d-wave superconductor islands where, in addition to the dominant order parameter (with a d_{x^2-y^2} symmetry), a subdominant order parameter of s or d_{xy} symmetry is added; (ii) in grain boundary junctions between two arbitrarily oriented d-wave superconductors, and between a d-wave and an s-wave superconductor. We show that the profile of the spontaneous current density and the magnetic field distribution depend on the time-reversal symmetry breaking properties of the system. For the d_{x^2-y^2}+id_{xy} state, vortices appear near the edges of the finite size systems. We associate these vortices with the chiral nature of the mixed order parameter. The method developed here is quite general, and can be used for predicting properties of any finite size superconducting system.
5 pages, 4 figures
References in corpus (4)
- Degenerate ground state in a mesoscopic YBaCuO grain boundary Josephson junction
- Experimental test for subdominant superconducting phases with complex order parameters in cuprate grain boundary junctions
- Mechanisms of Spontaneous Current Generation in an Inhomogeneous d-Wave Superconductor
- Quasiclassical Theory of Spontaneous Currents at Surfaces and Interfaces of d-Wave Superconductors
Cited by in corpus (10)
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- Nematicity from mixed S_{+-} + d_{x^2-y^2} states in iron-based superconductors
- Search for broken time-reversal symmetry near the surface of YBCO films using Beta-NMR
- Quasiclassical numerical method for mesoscopic superconductors: bound states in a circular d-wave island with a single vortex
- Paramagnetic effect in YBaCuO grain boundary junctions
- Non-Equilibrium Quasiclassical Theory for Josephson Structures
- Vortex-like current states in Josephson ballistic point contacts