Chiral adiabatic transmission protected by Fermi surface topology
arXiv:2311.17160 · doi:10.21468/SciPostPhys.18.3.098
Abstract
We demonstrate that Andreev modes that propagate along a transparent Josephson junction have a perfect transmission at the point where three junctions meet. The chirality and the number of quantized transmission channels is determined by the topology of the Fermi surface and the vorticity of the superconducting phase differences at the trijunction. We explain this chiral adiabatic transmission (CAT) as a consequence of the adiabatic evolution of the scattering modes both in momentum and real space. The dispersion relation of the junction then separates the scattering trajectories by introducing inaccessible regions of phase space. We expect that CAT is observable in nonlocal conductance and thermal transport measurements. Furthermore, because it does not rely on particle-hole symmetry, CAT is also possible to observe directly in metamaterials.
14 pages, 8 figures
References in corpus (20)
- Kwant: a software package for quantum transport
- A Silicon-on-Insulator Slab for Topological Valley Transport
- Isospin magnetism and spin-triplet superconductivity in Bernal bilayer graphene
- Near-zero-energy end states in topologically trivial spin-orbit coupled superconducting nanowires with a smooth confinement
- Transport spectroscopy of NS nanowire junctions with Majorana fermions
- Two-dimensional epitaxial superconductor-semiconductor heterostructures: A platform for topological superconducting networks
- Reproducing topological properties with quasi-Majorana states
- Spin-Orbit Enhanced Superconductivity in Bernal Bilayer Graphene
- Pseudospin-valley coupled edge states in a photonic topological insulator
- Topologically protected valley-dependent quantum photonic circuits
- Gate-Defined Josephson Junctions in Magic-Angle Twisted Bilayer Graphene
- Non-local spectroscopy of Andreev bound states
- InSbAs two-dimensional electron gases as a platform for topological superconductivity
- Closing of the Induced Gap in a Hybrid Superconductor-Semiconductor Nanowire
- Local and Nonlocal Transport Spectroscopy in Planar Josephson Junctions
- Nonlocal conductance spectroscopy of Andreev bound states in gate-defined InAs/Al nanowires
- Planar graphene-NbSe Josephson junctions in a parallel magnetic field
- Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene
- Probing Fermi sea topology by Andreev state transport
- Topological Andreev Rectification