Holographic insulator/superconductor phase transition in Born-Infeld   electrodynamics
  We studied holographic insulator/superconductor phase transition in the framework of Born-Infeld electrodynamics both numerically and analytically. First we numerically study the effects of the Born-Infeld electrodynamics on the phase transition, find that the critical chemical potential is not changed by the Born-Infeld parameter. Then we employ the variational method for the Sturm-Liouville eigenvalue problem to analytically study the phase transition. The analytical results obtained are found to be consistent with the numerical results. 
Nan Bai, Yi-Hong Gao, Guan-Bu Qi, Xiao-Bao Xu
hep-th