# Dielectric response of Anderson and pseudogapped insulators

@article{Feigelman2018DielectricRO, 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}, year={2018}, volume={20} }

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…

## 4 Citations

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An extensive experimental study on insulating NbxSi1−x close to the SIT, as well as corresponding numerical simulations of the electrical conductivity, shows that electronic transport is activated and dominated by charging energies at low temperatures.

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An experimental approach for cryogenic dielectric measurements on ultrathin insulating films using superconducting quarter-wave resonators with inductive coupling and a temperature-dependent measurement for a SrTiO3 bulk sample, using an in situ reference method to compensate for the temperature dependence of the superconductor properties.

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