Insulating phase of a disordered system: Fermi glass versus electron glass

R. N. Bhatt, T. V. Ramakrishnan

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23 Scopus citations


The authors examine the critical divergence of the low-frequency conductivity of the noninteracting Fermi glass and interacting electron glass models of the insulating phase of a disordered system as the metallic phase is approached. Results for the two are found to be rather different, which can be tested experimentally. In particular, for the electron glass, there exists a nonvanishing contribution to the dielectric constants from the low-frequency (hopping) conductivity even at low temperatures, which scales with the high-frequency (optical) contribution, and diverges with the same exponent at the insulator-metal transition.

Original languageEnglish (US)
Article number002
Pages (from-to)L639-L643
JournalJournal of physics C: Solid State Physics
Issue number24
StatePublished - 1984
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • General Engineering
  • General Physics and Astronomy


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