Mott-Hubbard metal-insulator transition at noninteger filling

  title={Mott-Hubbard metal-insulator transition at noninteger filling},
  author={Krzysztof Byczuk and Walter Hofstetter and Dieter Vollhardt},
  journal={Physical Review B},
Correlated electrons in a binary alloy ${A}_{x}{B}_{1\ensuremath{-}x}$ are investigated within the Hubbard model and dynamical mean-field theory (DMFT). The random energies ${\ensuremath{\epsilon}}_{i}$ have a bimodal probability distribution and an energy separation $\ensuremath{\Delta}.$ We solve the DMFT equations by the numerical renormalization-group method at zero temperature and calculate the spectral density as a function of disorder strength $\ensuremath{\Delta}$ and interaction U at… 

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