The computational study of chemical reactions in complex, wet environments is critical for applications in many fields. It is often essential to study chemical reactions in the presence of applied electrochemical potentials, taking into account the non-trivial electrostatic screening coming from the solvent and the electrolytes. As a consequence, the electrostatic potential has to be found by solving the generalized Poisson and the Poisson-Boltzmann equations for neutral and ionic solutions, respectively. In the present work, solvers for both problems have been developed. A preconditioned conjugate gradient method has been implemented for the solution of the generalized Poisson equation and the linear regime of the Poisson-Boltzmann, allowing to solve iteratively the minimization problem with some ten iterations of the ordinary Poisson equation solver. In addition, a self-consistent procedure enables us to solve the non-linear Poisson-Boltzmann problem. Both solvers exhibit very high accuracy and parallel efficiency and allow for the treatment of periodic, free, and slab boundary conditions. The solver has been integrated into the BigDFT and Quantum-ESPRESSO electronic-structure packages and will be released as an independent program, suitable for integration in other codes.
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7 January 2016
Research Article|
January 06 2016
A generalized Poisson and Poisson-Boltzmann solver for electrostatic environments
G. Fisicaro
;
G. Fisicaro
a)
1Department of Physics,
University of Basel
, Klingelbergstrasse 82, 4056 Basel, Switzerland
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L. Genovese;
L. Genovese
2
University of Grenoble Alpes
, CEA, INAC-SP2M, L_Sim, F-38000 Grenoble, France
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O. Andreussi;
O. Andreussi
3Institute of Computational Science,
Università della Svizzera Italiana
, Via Giuseppe Buffi 13, CH-6904 Lugano, Switzerland
4
Theory and Simulations of Materials (THEOS) and National Centre for Computational Design and Discovery of Novel Materials (MARVEL)
, École Polytechnique Fédérale de Lausanne, Station 12, CH-1015 Lausanne, Switzerland
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N. Marzari;
N. Marzari
4
Theory and Simulations of Materials (THEOS) and National Centre for Computational Design and Discovery of Novel Materials (MARVEL)
, École Polytechnique Fédérale de Lausanne, Station 12, CH-1015 Lausanne, Switzerland
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S. Goedecker
S. Goedecker
1Department of Physics,
University of Basel
, Klingelbergstrasse 82, 4056 Basel, Switzerland
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J. Chem. Phys. 144, 014103 (2016)
Article history
Received:
September 02 2015
Accepted:
December 06 2015
Citation
G. Fisicaro, L. Genovese, O. Andreussi, N. Marzari, S. Goedecker; A generalized Poisson and Poisson-Boltzmann solver for electrostatic environments. J. Chem. Phys. 7 January 2016; 144 (1): 014103. https://doi.org/10.1063/1.4939125
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