Multiple Chiral Majorana Fermion Modes and Quantum Transport

Abstract

We propose a general recipe for chiral topological superconductor (TSC) in two dimensions with multiple $N$ chiral Majorana fermion modes from a quantied anomalous Hall insulator in proximity to an s-wave superconductor with nontrivial band topology. A concrete example is that a $N=3$ chiral TSC may be realized by coupling a magnetic topological insulator and the ion-based superconductor such as FeTe${}_{1-x}$Se${}_x$ ($x=0.45$). We further propose the electrical and thermal transport experiments to detect the Majorana nature of three chiral edge fermions. A unique signature is that the two-terminal electrical conductance of a quantized anomalous Hall-TSC junction obeys a distribution averaged to $(2/3)e^2/h$, which is due to the random edge mode mixing of chiral Majorana fermions and is distinguished from possible trivial explanations.

5.2 pages, 4 figures, the conductance distribution is added

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Cited by in corpus (16)

• Electrically tunable chiral Majorana edge modes in quantum anomalous Hall insulator-topological superconductor systems
• Cross-dimensional universality classes in static and periodically driven Kitaev models
• Topological superconductivity in Landau levels
• Molecular beam epitaxy of superconducting FeSe${}_x$Te${}_{1-x}$ thin films interfaced with magnetic topological insulators
• Layer-Dependent Quantum Anomalous Hall Effect in Rhombohedral Graphene
• Distribution of Conductances in Chiral Topological Superconductor Junctions
• Inducing superconductivity in quantum anomalous Hall regime
• Intrinsic antiferromagnetic topological insulator and axion state in V2WS4
• Josephson junction arrays as a platform for topological phases of matter
• Disordered Quantum Transport in Quantum Anomalous Hall Insulator-Superconductor Junctions
• Robust quantized thermal conductance of Majorana floating edge bands in d-wave superconductors
• Edge optical effect as a probe of chiral topological superconductors
• Disorder-induced chiral and helical Majorana edge modes in a two-dimensional Ammann-Beenker quasicrystal
• Quantized Transport of $\nu =2/3$ Fractional Quantum Hall Edge with Disordered Superconducting Proximity
• Possible topological phases in quantum anomalous Hall insulator/unconventional superconductor hybrid systems
• Revealing Superconducting Chiral Edge Modes via Resistance Distributions