Majorana zero modes in twisted transition metal dichalcogenides homobilayers

Abstract

Semiconductor moiré superlattices provide a highly tunable platform to study the interplay between electron correlation and band topology. For example, the generalized Kane-Mele-Hubbard model can be simulated by the topological moiré flat bands in twisted transition metal dichalcogenides homobilayers. For this system, we obtain the filling factor, twist angle, and electric field-dependent quantum phase diagrams with a plethora of phases, including the quantum spin Hall insulator, the in-plane antiferromagnetic state, the out-of-plane antiferromagnetic Chern insulator, the spin-polarized Chern insulator, the in-plane ferromagnetic state, and the 120${}^{\circ }$ antiferromagnetic state. We predict that a gate-defined junction formed between the quantum spin Hall insulator phase with proximitized superconductivity and magnetic phases with in-plane magnetization (either ferromagnetic or antiferromagnetic) can realize one-dimensional topological superconductor with Majorana zero modes. Our proposal introduces semiconductor moiré homobilayers as an electrically tunable Majorana platform with no need of an external magnetic field.

12 pages, 9 figures

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Cited by in corpus (10)

• Electrically tuned topology and magnetism in twisted bilayer MoTe${}_2$ at ${\nu }_h=1$
• Variational Mapping of Chern Bands to Landau Levels: Application to Fractional Chern Insulators in Twisted MoTe${}_2$
• Interacting phase diagram of twisted bilayer MoTe${}_2$ in magnetic field
• Surface-dependent Majorana vortex phases in topological crystalline insulators
• Characterization of higher-order topological superconductors using Bott indices
• Topological magnons and domain walls in twisted bilayer MoTe${}_2$
• Double Majorana Vortex Flat Bands in the Topological Dirac Superconductor
• Quantum Phases in Twisted Homobilayer Transition Metal Dichalcogenides
• Interface engineering of van der Waals heterostructures towards energy-efficient quantum devices operating at high temperatures
• Majorana vortex phases in time-reversal invariant higher-order topological insulators and topologically trivial insulators