Density functional theory: An introduction

@article{Argaman2000DensityFT,
  title={Density functional theory: An introduction},
  author={Nathan Argaman and Guy Makov},
  journal={American Journal of Physics},
  year={2000},
  volume={68},
  pages={69-79}
}
Density functional theory(DFT) is one of the most widely used methods for ab initio calculations of the structure of atoms, molecules, crystals, surfaces, and their interactions. Unfortunately, the customary introduction to DFT is often considered too lengthy to be included in various curricula. An alternative introduction to DFT is presented here, drawing on ideas which are well-known from thermodynamics, especially the idea of switching between different independent variables. The central… 
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