Embedding approach for dynamical mean field theory of strongly correlated heterostructures

Details Embedding approach for dynamical mean field theory of strongly correlated heterostructures Embedding approach for dynamical mean field theory of strongly correlated heterostructures

2008-10-27

arxiv.org/abs/0810.4827v2

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 4 figures; typos corrected

Scientific paper

10.1103/PhysRevB.79.045130

We present an embedding approach based on localized basis functions which permits an efficient application of the dynamical mean field theory (DMFT) to inhomogeneous correlated materials, such as semi-infinite surfaces and heterostructures. In this scheme, the semi-infinite substrate leads connected to both sides of the central region of interest are represented via complex, energy-dependent embedding potentials that incorporate one-electron as well as many-body effects within the substrates. As a result, the number of layers which must be treated explicitly in the layer-coupled DMFT equation is greatly reduced. To illustrate the usefulness of this approach, we present numerical results for strongly correlated surfaces, interfaces, and heterostructures of the single-band Hubbard model.

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