Dynamical Vertex Approximation : An Introduction(Interaction and Nanostructural Effects in Low-Dimensional Systems)

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概要

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• We give an elementary introduction to a recent diagrammatic extension of dynamical mean field theory (DMFT) coined dynamical vertex approximation (DΓA). This approach contains the important local correlations of DMFT, giving, among others, rise to quasiparticle renormalizations, Mott-Hubbard transitions and magnetism, but also non-local correlations beyond. The latter are at the very essence of many physical phenomena in strongly correlated elecectron systems. As correlations are treated equally on all length scales, DΓA allows us to describe physical phenomena such as magnons, quantum criticality, and the interplay between antiferromagnetism and superconductivity. We review results hitherto obtained for the Hubbard model in dimensions d=3, 2, and 1.

• 理論物理学刊行会の論文
• 2009-02-05

著者

• Held Karsten

  Institute Of Solid State Physics Vienna University Of Technology

• Toschi Alessandro

  Max-planck-institut Fur Festkorperforschung

• KATANIN Andrey

  Max-Planck-Institut fur Festkorperforschung

• Katanin Andrey

  Max-planck-institut Fur Festkorperforschung:institute Of Metal Physics

• HELD Karsten

  Institute of Solid State Physics, Vienna University of Technology

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