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Electronic Structure Calculations with LDA\(+\)DMFT

  • Eva Pavarini
Chapter
Part of the Mathematical Physics Studies book series (MPST)

Abstract

The LDA+DMFT method is a very powerful tool for gaining insight into the physics of strongly correlated materials. It combines traditional ab-initio density-functional techniques with the dynamical mean-field theory. The core aspects of the method are (1) building material-specific Hubbard-like many-body models and (2) solving them in the dynamical mean-field approximation. Step (1) requires the construction of a localized one-electron basis, typically a set of Wannier functions. It also involves a number of approximations, such as the choice of the degrees of freedom for which many-body effects are explicitly taken into account, the scheme to account for screening effects, or the form of the double-counting correction. Step (2) requires the dynamical mean-field solution of multi-orbital generalized Hubbard models. Here central is the quantum-impurity solver, which is also the computationally most demanding part of the full LDA+DMFT approach. In this chapter I will introduce the core aspects of the LDA+DMFT method and present a prototypical application.

Keywords

Wannier Function Orbital Order Numerical Renormalization Group Screen Coulomb Interaction Quantum Impurity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Support of the Deutsche Forschungsgemeinschaft through FOR1346 is gratefully acknowledged.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Institute for Advanced SimulationForschungszentrum Jülich GmbHJülichGermany

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