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Open Access Publications from the University of California

Periodic Pulay method for robust and efficient convergence acceleration of self-consistent field iterations

  • Author(s): Banerjee, AS
  • Suryanarayana, P
  • Pask, JE
  • et al.

© 2016 Elsevier B.V. All rights reserved. Pulay's Direct Inversion in the Iterative Subspace (DIIS) method is one of the most widely used mixing schemes for accelerating the self-consistent solution of electronic structure problems. In this work, we propose a simple generalization of DIIS in which Pulay extrapolation is performed at periodic intervals rather than on every self-consistent field iteration, and linear mixing is performed on all other iterations. We demonstrate through numerical tests on a wide variety of materials systems in the framework of density functional theory that the proposed generalization of Pulay's method significantly improves its robustness and efficiency.

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