Quantum limit of the triplet proximity effect in half-metal–superconductor junctions
B. Béri, J. N. Kupferschmidt, C. W. J. Beenakker, P. W. Brouwer
DOI 10.1103/PhysRevB.79.024517 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We apply the scattering matrix approach to the triplet proximity effect in superconductor–half-metal structures. We find that for junctions that do not mix different orbital modes, the zero-bias Andreev conductance vanishes, while the zero-bias Josephson current is nonzero. We illustrate this finding on a ballistic half-metal–superconductor (HS) and superconductor–half-metal–superconductor (SHS) junctions with translation invariance along the interfaces and on HS and SHS systems where transport through the half-metallic region takes place through a single conducting channel. Our calculations for these physically single-mode setups—single-mode point contacts and chaotic quantum dots with single-mode contacts—illustrate the main strength of the scattering matrix approach. It allows for studying systems in the quantum mechanical limit, which is inaccessible for the quasiclassical Green’s function methods, the main theoretical tool in previous works on the triplet proximity effect.
Similar papers
Quasiclassical theory of magnetoelectric effects in superconducting heterostructures in the presence of spin-orbit coupling
similarity 0.90I. V. Bobkova & A. M. Bobkov
Source status unknown — claims are unverified
Superconducting proximity effect and zero-bias anomaly in transport through quantum dots weakly attached to ferromagnetic leads
similarity 0.90Ireneusz Weymann & Piotr Trocha
Source status unknown — claims are unverified
0-π Transition in Magnetic Triplet Superconductor Josephson Junctions
similarity 0.90P. M. R. Brydon & Dirk Manske
Source status unknown — claims are unverified
Superconducting proximity effect in long superconductor/graphene/superconductor junctions: From specular Andreev reflection at zero field to the quantum Hall regime
similarity 0.89Katsuyoshi Komatsu et al.
Source status unknown — claims are unverified
Domain walls and long-range triplet correlations in SFS Josephson junctions
similarity 0.89A. I. Buzdin et al.
Source status unknown — claims are unverified
Proximity-induced superconductivity at nonhelical topological insulator interfaces
similarity 0.89David J. Alspaugh et al.
Source status unknown — claims are unverified