Vm. Agranovich et Kn. Ilinski, DIELECTRIC-METAL PHASE-TRANSITION IN A SYSTEM OF INTERACTING CHARGE-TRANSFER EXCITONS, Physics letters. A, 191(3-4), 1994, pp. 309-316
We demonstrate that strong dipole-dipole repulsion of 1D and 2D charge
transfer excitons (CTE) can induce, at sufficiently high exciton conc
entrations, an electron dielectric-metal phase transition.