Enhancement of superconductivity with external phonon squeezing

Abstract

Squeezing of phonons due to the non-linear coupling to electrons is a way to enhance superconductivity as theoretically studied in a recent work [Kennes et al. Nature Physics 13, 479 (2017)]. We study quadratic electron-phonon interaction in the presence of phonon pumping and an additional external squeezing. Interference between these two driving sources induces a phase-sensitive enhancement of electron-electron attraction, which we find as a generic mechanism to enhance any boson-mediated interactions. The strongest enhancement of superconductivity is shown to be on the boundary with the dynamical lattice instabilities caused by driving. We propose several experimental platforms to realize our scheme.

References in corpus (3)

• Coherent Modulation of the YBa2Cu3O6+x Atomic Structure by Displacive Stimulated Ionic Raman Scattering
• Strong mechanical squeezing in a standard optomechanical system by pump modulation
• Tunable exciton-optomechanical coupling in suspended monolayer MoSe2

Cited by in corpus (7)

• Cavity Quantum Materials
• Cavity magnon-polaritons in cuprate parent compounds
• Cavity engineering of Hubbard $U$ via phonon polaritons
• Floquet engineering of many-body states by the ponderomotive potential
• Terahertz high-harmonic generation in gapped antiferromagnetic chains
• Optical manipulation of bipolarons in a system with nonlinear electron-phonon coupling
• Diagnosing electronic phases of matter using photonic correlation functions