Insulator-metal-insulator transition and selective spectral weight transfer in a disordered strongly correlated system

Details Insulator-metal-insulator transition and selective spectral weight transfer in a disordered strongly correlated system Insulator-metal-insulator transition and selective spectral weight transfer in a disordered strongly correlated system

2005-12-29

arxiv.org/abs/cond-mat/0512702v1

Phys. Rev. B 74, 085116 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.74.085116

We investigate the metal insulator transitions at finite temperature for the Hubbard model with diagonal alloy disorder. We solve the dynamical mean field theory equations with the non crossing approximation and we use the coherent potential approximation to handle disorder. The excitation spectrum is given for various correlation strength $U$ and disorder. Two successive metal insulator transitions are observed at integer filling values as $U$ is increased. An important selective transfer of spectral weight arises upon doping. The strong influence of the temperature on the low energy dynamics is studied in details.

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