Theory of Josephson effect in chiral p-wave superconductor / diffusive normal metal / chiral p-wave superconductor junctions
arXiv:cond-mat/0611202 · doi:10.1103/PhysRevB.75.134508
Abstract
We study the Josephson effect between chiral p-wave superconductor / diffusive normal metal (DN) / chiral p-wave superconductor (CP/DN/CP) junctions using quasiclassical Green's function formalism with proper boundary conditions. The px+ipy-wave symmetry of superconducting order parameter is chosen which is believed to be a pairing state in Sr2RuO4. It is shown that the Cooper pairs induced in DN have an odd-frequency spin-triplet s-wave symmetry, where pair amplitude is an odd function of Matsubara frequency. Despite the peculiar symmetry properties of the Cooper pairs, the behavior of the Josephson current is rather conventional. We have found that the current phase relation is almost sinusoidal and the Josephson current is proportional to exp(-L/xi), where xi is the coherence length of the Cooper pair in DN and L is the length of DN. The Josephson current between CP / diffusive ferromagnet metal (DF) / CP junctions is also calculated. It is shown that the 0-pi transition can be realized by varying temperature or junction length L similar to the case of conventional s-wave junctions. These results may serve as a guide to study superconducting state of Sr2RuO4.
9 pages, 9 figures
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- Induced unconventional superconductivity on the surface states of BiTe topological insulator
- Interplay of ferromagnetism and triplet superconductivity in a Josephson junction
- Robustness of Spin-Triplet Pairing and Singlet-Triplet Pairing Crossover in Superconductor/Ferromagnet Hybrids
- Geometric Induction in Chiral Superconductors
- Odd-frequency Cooper pair amplitude around a vortex core in a chiral p-wave superconductor in the quantum limit
- Spin and Charge Currents in SNS Josephson Junction with f-wave Pairing Symmetry
- Josephson effect between triplet superconductors through a ferromagnetic barrier of finite width
- Anomalous Surface Impedance in a Normal-metal/Superconductor Junction with a Spin-active Interface
- Characterization of Sr2RuO4 Josephson junctions made of epitaxial films
- Spin conductance in SNN junctions with non-centrosymmetric superconductors