A Model for the Coexistence of p-wave Superconductivity and   Ferroelectricity
  A model for the coexistence of p-wave superconductivity (SC) and ferroelectricity (FE) is presented. The Hamiltonian of SC sector and FE sector can be diagonalized by using the $so(5)$ and $h(4)$ algebraic coherent states respectively. We assume a minimal symmetry-allow coupling and simplify the total Hamiltonian through a double mean-field approximation (DMFA).   A variational coherent-state (VCS) trial wave-function is applied for the ground state. It is found that the ferroelectricity gives rise to the magnetic field effect of p-wave superconductivity. 
Hong-Biao Zhang, Li-Jun Tian, Guo-Hong Yang, Shuo Jin, Mo-Lin Ge