Enhancement of superconductivity with external phonon squeezing
Enhancement of superconductivity with external phonon squeezing
Squeezing of phonons due to the nonlinear coupling to electrons is a way to enhance superconductivity as theoretically studied in a recent work [Kennes et al., Nat. Phys. 13, 479 (2017)]. We study quadratic electron-phonon interaction in the presence of phonon pumping and an additional external squeezing. Interference between these …