Dual fermion method for disordered electronic systems

  title={Dual fermion method for disordered electronic systems},
  author={Hanna Terletska and S.-X. Yang and Zi Yang Meng and Juana Moreno and Mark Jarrell},
  journal={Physical Review B},
  • Hanna Terletska, S.-X. Yang, +2 authors Mark Jarrell
  • Published 2013
  • Physics
  • Physical Review B
  • While the coherent potential approximation (CPA) is the prevalent method for the study of disordered electronic systems, it fails to capture nonlocal correlations and Anderson localization. To incorporate such effects, we extend the dual fermion approach to disordered systems using the replica method. The developed method utilizes the exact mapping to the dual fermion variables, and includes intersite scattering via diagrammatic perturbation theory in the dual variables. The CPA is recovered as… CONTINUE READING

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