Mott transition and suppression of orbital fluctuations in orthorhombic 3d1 perovskites.

نویسندگان

  • E Pavarini
  • S Biermann
  • A Poteryaev
  • A I Lichtenstein
  • A Georges
  • O K Andersen
چکیده

Using t(2g) Wannier functions, a low-energy Hamiltonian is derived for orthorhombic 3d(1) transition-metal oxides. Electronic correlations are treated with a new implementation of dynamical mean-field theory for noncubic systems. Good agreement with photoemission data is obtained. The interplay of correlation effects and cation covalency (GdFeO3-type distortions) is found to suppress orbital fluctuations in LaTiO3 and even more in YTiO3, and to favor the transition to the insulating state.

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عنوان ژورنال:
  • Physical review letters

دوره 92 17  شماره 

صفحات  -

تاریخ انتشار 2004