We show that all-electron relativistic four-component Dirac-Kohn-Sham (DKS) computations, using G-spinor basis sets and state-of-the-art density fitting algorithms, can be efficiently parallelized and applied to large molecular systems, including large clusters of heavy atoms. The performance of the parallel implementation of the DKS module of the program BERTHA is illustrated and analyzed by some test calculations on several gold clusters up to Au(32), showing that calculations with more than 25 000 basis functions (i.e., DKS matrices on the order of 10 GB) are now feasible. As a first application of this novel implementation, we investigate the interaction of the atom Hg with the Au(20) cluster.

An Efficient Parallel All-Electron Four-Component Dirac-Kohn-Sham Program Using a Distributed Matrix Approach

Belpassi L;
2010

Abstract

We show that all-electron relativistic four-component Dirac-Kohn-Sham (DKS) computations, using G-spinor basis sets and state-of-the-art density fitting algorithms, can be efficiently parallelized and applied to large molecular systems, including large clusters of heavy atoms. The performance of the parallel implementation of the DKS module of the program BERTHA is illustrated and analyzed by some test calculations on several gold clusters up to Au(32), showing that calculations with more than 25 000 basis functions (i.e., DKS matrices on the order of 10 GB) are now feasible. As a first application of this novel implementation, we investigate the interaction of the atom Hg with the Au(20) cluster.
2010
Istituto di Scienze e Tecnologie Molecolari - ISTM - Sede Milano
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/222023
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