Dielectric response of Anderson and pseudogapped insulators

  title={Dielectric response of Anderson and pseudogapped insulators},
  author={Mikhail V. Feigel'man and Dmitri A. Ivanov and Emilio Cuevas},
  journal={New Journal of Physics},
Using a combination of analytic and numerical methods, we study the polarizability of a (non-interacting) Anderson insulator in one-, two-, and three-dimensions and demonstrate that, in a wide range of parameters, it scales proportionally to the square of the localization length, contrary to earlier claims based on the effective-medium approximation. We further analyze the effect of electron–electron interactions on the dielectric constant in quasi-1D, quasi-2D and 3D materials with large… 
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