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We explored electrically tunable exciton-mediated superconductivity in bilayer semiconductors. Gating conditions were identified to achieve exciton density wave order, leading to superconductivity via Goldstone modes.

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Area of Science:

  • Condensed matter physics
  • Materials science

Background:

  • Synthetic platforms offer advanced control over strongly correlated phases.
  • Bilayer semiconductors are promising for novel quantum phenomena.

Purpose of the Study:

  • Investigate electrically tunable exciton-mediated superconductivity.
  • Identify conditions for exciton density wave order in charge-imbalanced bilayer semiconductors.

Main Methods:

  • Self-consistent Hartree-Fock approximation.
  • Analysis of exciton-fermion coupling.
  • Investigated Goldstone mode mediation of interactions.

Main Results:

  • Identified gating conditions for exciton density wave order.
  • Demonstrated Goldstone modes mediate attractive interactions, inducing superconductivity.
  • Showcased potential for interlayer pair-density wave superconductors near density wave order.

Conclusions:

  • Exciton-mediated superconductivity is achievable and electrically tunable in bilayer semiconductors.
  • Excitonic fluctuations play a crucial role in mediating superconductivity.
  • The study proposes experimental signatures for observed phenomena.