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From plane waves to local Gaussians for the simulation of correlated periodic systems

Booth, George H. and Tsatsoulis, Theodoros and Chan, Garnet Kin-Lic and Grüneis, Andreas (2016) From plane waves to local Gaussians for the simulation of correlated periodic systems. Journal of Chemical Physics, 145 (8). Art. No. 084111. ISSN 0021-9606. doi:10.1063/1.4961301.

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We present a simple, robust, and black-box approach to the implementation and use of local, periodic, atom-centered Gaussian basis functions within a plane wave code, in a computationally efficient manner. The procedure outlined is based on the representation of the Gaussians within a finite bandwidth by their underlying plane wave coefficients. The core region is handled within the projected augment wave framework, by pseudizing the Gaussian functions within a cutoff radius around each nucleus, smoothing the functions so that they are faithfully represented by a plane wave basis with only moderate kinetic energy cutoff. To mitigate the effects of the basis set superposition error and incompleteness at the mean-field level introduced by the Gaussian basis, we also propose a hybrid approach, whereby the complete occupied space is first converged within a large plane wave basis, and the Gaussian basis used to construct a complementary virtual space for the application of correlated methods. We demonstrate that these pseudized Gaussians yield compact and systematically improvable spaces with an accuracy comparable to their non-pseudized Gaussian counterparts. A key advantage of the described method is its ability to efficiently capture and describe electronic correlation effects of weakly bound and low-dimensional systems, where plane waves are not sufficiently compact or able to be truncated without unphysical artifacts. We investigate the accuracy of the pseudized Gaussians for the water dimer interaction, neon solid, and water adsorption on a LiH surface, at the level of second-order Møller–Plesset perturbation theory.

Item Type:Article
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URLURL TypeDescription Paper
Chan, Garnet Kin-Lic0000-0001-8009-6038
Additional Information:© 2016 AIP Publishing. Received 21 March 2016; accepted 7 August 2016; published online 29 August 2016. We gratefully acknowledge the help with the implementation in VASP and useful discussions with Georg Kresse and Martijn Marsman. G.H.B gratefully acknowledges funding from the Royal Society. G. K.-L. Chan acknowledges support from the US Department of Energy through Grant No. DE-SC0010530, with secondary support from Grant No. DE-SC0008624 (SciDAC).
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0010530
Department of Energy (DOE)DE-SC0008624
Issue or Number:8
Record Number:CaltechAUTHORS:20161221-104314806
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73065
Deposited By: Donna Wrublewski
Deposited On:21 Dec 2016 18:57
Last Modified:11 Nov 2021 05:10

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