Possible Topological Superconducting Phases of MoS${}_2$

Abstract

Molybdenum disulphide (MoS${}_2$) has attracted much interest in recent years due to its potential applications in a new generation of electronic devices. Recently, it was shown that thin films of MoS${}_2$ can become superconducting with a highest $T_c$ of 10K when the material is heavily gated to the conducting regime. In this work, using the group theoretical approach, we determine the possible pairing symmetries of heavily gated MoS${}_2$. Depending on the electron-electron interactions, the material can support an exotic spin-singlet $p+ip$-wave-like, an exotic spin-triplet s-wave-like and an conventional spin-triplet $p$-wave pairing phases. Importantly, the exotic spin-singlet $p+ip$-wave phase is a topological superconducting phase which breaks time-reversal symmetry spontaneously and possesses chiral Majorana edge states.

arXiv comment5 pages, 4 figures. References added. Comments are welcome

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• Quantum Spin Hall Effect and Topological Phase Transition in Two-Dimensional Square Transition Metal Dichalcogenides
• Magnetic Field Driven Nodal Topological Superconductivity in Monolayer Transition Metal Dichalcogenides
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• Odd-parity superconductivity in the vicinity of inversion symmetry breaking in spin-orbit-coupled systems
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• Unconventional superconductivity in bilayer transition metal dichalcogenides
• Spin-orbit coupling induced valley Hall effects in transition-metal dichalcogenides
• Multi-Valley Superconductivity In Ion-Gated MoS2 Layers
• Tunneling spectroscopy of gate-induced superconductivity in MoS${}_2$
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• Magnetoelectric Effects in Gyrotropic Superconductors
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• Band filling and cross quantum capacitance in ion gated semiconducting transition metal dichalcogenide monolayers
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• Unconventional superconductivity and anomalous response in hole-doped transition metal dichalcogenides
• Interplay of screening and superconductivity in low-dimensional materials
• Nematic, chiral and topological superconductivity in transition metal dichalcogenides
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• Switch effect and $0$-$\pi$ transition in Ising superconductor Josephson junctions
• Singlet, Triplet and Pair Density Wave Superconductivity in the Doped Triangular-Lattice Moiré System
• Topological Superconductivity in Two Dimensions with Mixed Chirality
• Topological superconductivity in Dirac honeycomb systems
• Volkov-Pankratov states in topological superconductors
• Theory of superconductivity in hole-doped monolayer MoS${}_2$
• Multiband strong-coupling superconductors with spontaneously broken time-reversal symmetry
• Valley Edelstein Effect in Monolayer Transition Metal Dichalcogenides
• Mapping multi-valley Lifshitz transitions induced by field-effect doping in strained MoS2 nanolayers
• Signatures of triplet correlations in density of states of Ising superconductors
• Engineering nodal topological phases in Ising superconductors by magnetic superstructures
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• Transport properties of spin-triplet superconducting monolayer $Mo{S}_2$
• Non-Destructive Low-Temperature Contacts to MoS2 Nanoribbon and Nanotube Quantum Dots
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• Theory of magnetic response in finite two-dimensional superconductors
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