Non-perturbative embedding of local defects in crystalline materials

Details Non-perturbative embedding of local defects in crystalline materials Non-perturbative embedding of local defects in crystalline materials

2007-06-06

arxiv.org/abs/0706.0794v2

Physics

Condensed Matter

Other Condensed Matter

13 pages, 4 figures

Scientific paper

10.1088/0953-8984/20/29/294213

We present a new variational model for computing the electronic first-order density matrix of a crystalline material in presence of a local defect. A natural way to obtain variational discretizations of this model is to expand the difference Q between the density matrix of the defective crystal and the density matrix of the perfect crystal, in a basis of precomputed maximally localized Wannier functions of the reference perfect crystal. This approach can be used within any semi-empirical or Density Functional Theory framework.

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