Chiral Majorana Modes via Proximity to a Twisted Cuprate Bilayer

Abstract

We propose a novel heterostructure to achieve chiral topological superconductivity in 2D. A substrate with a large Rashba spin-orbit coupling energy is brought in proximity to a twisted bilayer of thin films exfoliated from a high-temperature cuprate superconductor. The combined system is then exposed to an out-of-plane magnetic field. The rare $d+id$ pairing symmetry expected to occur in such a system allows for nontrivial topology; specifically, in contrast to the case of the twisted bilayer in isolation, the substrate induces an odd Chern number. The resulting phase is characterized by the presence of a Majorana zero mode in each vortex.

7 pages, 6 figures

References in corpus (6)

• Non-Abelian Anyons and Topological Quantum Computation
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Non-Abelian Topological Orders and Majorana Fermions in Spin-Singlet Superconductors
• High-temperature topological superconductivity in twisted double layer copper oxides
• High-temperature Majorana zero modes
• Incoherent tunneling and topological superconductivity in twisted cuprate bilayers

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