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- W3045188219 abstract "In this paper, we propose a way to realize topological $s$-wave superconductivity with the application of circularly polarized laser light in two-dimensional bilayer transition metal dichalcogenides (TMDs). Using Floquet theory, we analyze a tight-binding model of bilayer TMDs with time-periodic electric fields. After deriving an effective Hamiltonian, we investigate topological properties of the $s$-wave superconducting state. The laser light induces valley-dependent layer polarization and makes the system a topologically nontrivial superconducting state characterized by the Chern number. We show topological phase diagrams in the absence and presence of the Kane-Mele spin-orbit coupling which causes hidden spin polarization in bilayer TMDs. Although the topological phase diagram is affected by the spin-orbit coupling, topological superconductivity can be realized without relying on the spin-orbit coupling in sharp contrast to a previous proposal of laser-induced topological superconductivity [Takasan et al., Phys. Rev. B 95, 134508 (2017)]. We also discuss experimental setups to detect the topological phase." @default.
- W3045188219 created "2020-07-29" @default.
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- W3045188219 date "2020-11-20" @default.
- W3045188219 modified "2023-10-15" @default.
- W3045188219 title "Laser-induced topological <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>s</mml:mi></mml:math> -wave superconductivity in bilayer transition metal dichalcogenides" @default.
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- W3045188219 doi "https://doi.org/10.1103/physrevb.102.174508" @default.
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