Wigner crystallization due to electrons localized at deep traps in two-dimensional amorphous dielectric

摘要

We calculated the spatial distribution of electrons localized at deep neutral traps in some amorphous dielectric films based on some fundamental physics in order to explain the phenomena such as space ordering of electrons. We showed that when the surface density of traps (N_s) is much larger than that of the trapped electrons (n_s), e.g., n_s/N_s≤0.001, Wigner crystallization occurs due to the Coulomb repulsion of trapped electrons and a two-dimensional quasiperiodic hexagonal lattice or Wigner glass can be formed.